Free Writing Prospectus
HL:NYSE
Free Writing Prospectus
Filed Pursuant to Rule 433
Registration No. 333-145919
December 12, 2007

Cautionary Note
Regarding
Forward
Looking
Statements
Statements made which are not historical facts, such as anticipated payments, litigation outcome,
production, sales of assets, exploration results and plans, costs, and prices or sales performance are
“forward-looking statements”
within the meaning of the Private Securities Litigation Reform Act of 1995,
and involve
a
number
of
risks
and
uncertainties
that
could
cause
actual
results
to
differ
materially
from
those projected, anticipated, expected or implied. These risks and uncertainties include, but are not limited
to,
metals
price
volatility,
volatility
of
metals
production
and
costs,
exploration
risks
and
results,
political
risks, project development risks, labor issues and ability to raise financing. Refer to the company’s Form 10-
Q and 10-K reports for a more detailed discussion of factors that may impact expected future results. The
company undertakes no obligation and has no intention of updating forward-looking statements.
Cash Cost
Per
Ounce
Reconciliation
to
GAAP
On Hecla Mining Company’s website at
www.hecla-mining.com
you
can
find
the
quantitative
reconciliation
to GAAP of cash cost per ounce. The reconciliation can be found in this presentation, or in Hecla’s quarterly
earnings news release in the Investor Relations section of the website, as well as in the company’s Form 10-
K and 10-Q reports.
A Registration
Statement
has
been
Filed
Hecla Mining Company has filed a registration statement (including a prospectus) with the SEC for the
offering to
which
this
communication
relates.
Before
you
invest,
you
should
read
the
prospectus
in
that
registration statement and other documents the issuer has filed with the SEC for more complete information
about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC Web
site at
www.sec.gov.
Alternatively,
copies
of
the
preliminary
prospectus
supplement
and
accompanying
prospectus relating to this offering may be obtained by contacting Merrill Lynch & Co., 4 World Financial
Center, New York, New York 10080; phone 212-449-1000.
Cautionary Note
Regarding
Forward
Looking
Statements
Statements made which are not historical facts, such as anticipated payments, litigation outcome,
production, sales of assets, exploration results and plans, costs, and prices or sales performance are
“forward-looking statements”
within the meaning of the Private Securities Litigation Reform Act of 1995,
and involve
a
number
of
risks
and
uncertainties
that
could
cause
actual
results
to
differ
materially
from
those projected, anticipated, expected or implied. These risks and uncertainties include, but are not limited
to,
metals
price
volatility,
volatility
of
metals
production
and
costs,
exploration
risks
and
results,
political
risks, project development risks, labor issues and ability to raise financing. Refer to the company’s Form 10-
Q and 10-K reports for a more detailed discussion of factors that may impact expected future results. The
company undertakes no obligation and has no intention of updating forward-looking statements.
Cash Cost
Per
Ounce
Reconciliation
to
GAAP
On Hecla Mining Company’s website at
www.hecla-mining.com
you
can
find
the
quantitative
reconciliation
to GAAP of cash cost per ounce. The reconciliation can be found in this presentation, or in Hecla’s quarterly
earnings news release in the Investor Relations section of the website, as well as in the company’s Form 10-
K and 10-Q reports.
A Registration
Statement
has
been
Filed
Hecla Mining Company has filed a registration statement (including a prospectus) with the SEC for the
offering to
which
this
communication
relates.
Before
you
invest,
you
should
read
the
prospectus
in
that
registration statement and other documents the issuer has filed with the SEC for more complete information
about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC Web
site at
www.sec.gov.
Alternatively,
copies
of
the
preliminary
prospectus
supplement
and
accompanying
prospectus relating to this offering may be obtained by contacting Merrill Lynch & Co., 4 World Financial
Center, New York, New York 10080; phone 212-449-1000.
Cautionary Statements
Cautionary Statements

Offering Summary
Offering Summary
Security:
Mandatory Convertible Preferred
Shares
Size:
$175 Million (+15% Over-Allotment
Option)
Payment Rate:
6.25% +/- 0.25%
Conversion Premium:
20.0% +/- 2.0%
Maturity:
3 Years
Use of Proceeds:
General corporate purposes, including
acquisitions
Bookrunners:
Merrill Lynch, JPMorgan

Low Cost, Low Risk,
Low Cost, Low Risk,
High Potential
High Potential
Low Cost Silver
$(4.91) cash cost per ounce of silver*
Low Risk Silver
Geo-politically stable locations
Long life, low cost silver operations
$195 million cash, no debt, unhedged
High Potential
Exploration success and future potential upside
Acquisition focus
* Q3 2007 average total cash cost per ounce

Greens Creek
Lucky Friday
New Vancouver
office
Focused on
internal growth and
acquisitions: Mexico,
Silver Valley, the
world
$195 million on
hand, no debt
$23 million
exploration program
San Sebastian
Growing Hecla
Growing Hecla
La Camorra
Coeur d’Alene
Vancouver
Operations
Exploration
Corporate Office

Mining Silver & Gold
Mining Silver & Gold
(For 116 Years!)
2007 Estimates
Approx. 6 million ounces
of silver
Approx. 110,000-
115,000 ounces of gold
25,000 tons of zinc
24,000 tons of lead

Lucky Friday
Lucky Friday
Lucky
Friday
Location:
Mullan,
Idaho
2007 Estimate:
3.2 million ounces
silver
18,000 tons lead
7,000 tons zinc
Longest operating    
mine (nearly 60 years)

Lucky Friday
Lucky Friday
Expansion Potential
Expansion Potential

Lucky Friday: 30 Vein
Lucky Friday: 30 Vein
& Intermediate Veins
& Intermediate Veins

8.4/4.4/0.2
4050 Level
4900 Level
5900 Level
6900 Level
7900 Level
Conceptual layout
#4 Shaft
17.6/11.4/0.9
18.3/11.4/11.9
26.3/28.8/7.8
3.8/4.5/0.3
Lucky Friday:
Lucky Friday:
Going Deeper
Going Deeper
Drill Holes
Silver opt/Lead%/Zinc%

Silver Valley
Silver Valley
Production & Potential
Production & Potential
Location: North Idaho
Historic World Silver
Producer: 1.2 Billion Oz.
300 million oz Silver
from Hecla’s land position
25 square miles
Very little modern
exploration
Hecla Land Position

Silver Valley
Silver Valley
Expansion Potential
Expansion Potential

Greens Creek
Greens Creek
Greens Creek
Location:
Admiralty 
Island, Alaska
29.73% joint venture
with Rio Tinto
2007 Estimate:
2.7 million ounces
silver
19,000 ounces gold
18,000 tons zinc
6,000 tons lead

Lower Zinc-Lil’
Sore Trend
Killer-Bruin-Cub
Creek Target
Near Mine
Targets
Greens Creek
Greens Creek
Long-Term Potential
Long-Term Potential
Greens Creek
Property Boundary

Mexican Silver Belt
Mexican Silver Belt
Santa Eulalia
Batopilas
Parral
San Dimas
Fresnillo
Zacatecas
Real de Angeles
Pachuca
Guanajuato
Taxco
Real de Catorce
Concepcion
del Oro
MEXICAN SILVER BELT
10.2 Billion Ounces of
Historical Silver Production
SAN SEBASTIAN

San Sebastian
San Sebastian
Exploration Targets
Exploration Targets

Sacramento
Sacramento
vein
vein
Concepcion
Concepcion
vein      
vein      
(7.7 opt Ag,
(7.7 opt Ag,
7.2 opt Ag)
7.2 opt Ag)
La Soledad
La Soledad
vein and mine
vein and mine
(8.6 opt
(8.6 opt
Ag)
Arcangeles
Arcangeles
vein
vein
San Martin
San Martin
vein       
vein       
(178 opt Ag)
(178 opt Ag)
El Leon
El Leon
vein
vein
Rio Grande Project:
Rio Grande Project:
Exciting Early Results
Exciting Early Results
Zacatecas
Zacatecas
State, Mexico
State, Mexico

Hecla’s Value is Silver
Hecla’s Value is Silver
% of Hecla Value
Gross profit
100%
0%
Revenue
68%
32%
*
*
* Quarter ended 9/30/07
Silver
Operations
Gold
Operations

Consistently Low
Consistently Low
Silver Cash Costs
Silver Cash Costs
Hecla
Hecla
Silver
Wheaton
*
Coeur
*
Pan
American
*
Includes third-party production
Weighted
Average
Silver
Cash
Costs
Per
Ounce
2003
–
Qtr
3
2007
$1
$2
$3
$4

Lowest-Risk Silver
Lowest-Risk Silver
Reserves
Reserves
0%
20%
40%
60%
80%
100%
Location of Hecla’s Silver
North
America
100%

Exploration
Exploration
2007E
United States
$  6.8
Mexico
7.7
Venezuela
3.7
Unallocated/Other*
4.3
Total Exploration
$  22.5
(in millions)
* Includes Vancouver Office and Corporate Development

Project Pipeline 
Project Pipeline 
IDAHO
Silver Valley 3D compilation
25-square-mile target area
Lucky Friday ‘Gap’
area and deep underground drilling
Lucky Friday mill upgrade
Lucky Friday 4 Shaft & Expansion
Prefeasibility
MEXICO
340-square-mile target area: multiple targets
Hugh Zone
Rio Grande
ALASKA
5250 Zone
West Gallagher Zone
Surface drilling for new deposit
VENEZUELA
Block B
El Dorado targets: awaiting permits

Catalysts for Growth
Catalysts for Growth
in Value
in Value
Additional value at Lucky Friday, San
Sebastian and Greens Creek
Prefeasibility
milestones for increased
production at Lucky Friday
Generating new targets in the Silver Valley
Advance San Sebastian “targets”
to
“discoveries”
Merger and/or acquisition activity

Poised for Growth
Poised for Growth
Opportunities
Opportunities
Potential $100+ million cash flow from producing
properties
Approximately $195 million cash and short-term
investments
$30 million credit facility
Debt free
Shelf Registrations in place
Tax benefit from NOLs*
*Net Operating Losses

Well-Staffed, Loyal
Well-Staffed, Loyal
& Experienced Team
& Experienced Team
8 Executive Officers
179 years mining industry
experience
Technical Team
23 engineers
26 geologists
4 metallurgists
(As of September 2007)

Silver Price Shines
Silver Price Shines
Strong Demand
Flat Supply
Declining Inventories
Rising Silver Price

GAAP Reconciliation to Cash Costs
GAAP Reconciliation to Cash Costs
Per Ounce
Per Ounce
HECLA MINING COMPANY
Reconciliation of Cash Costs per Ounce to Generally Accepted Accounting Principles (GAAP)(1)
(dollars and ounces in thousands, except per ounce –
unaudited)
Three Months Ended
Nine Months Ended
Sept. 30, 2007
Sept. 30, 2006
Sept. 30, 2007
Sept. 30, 2006
Total cash costs (1)
$
(6,615)
$
881
$
(11,314)
$
5,928
Divided by silver ounces produced
1,341
1,496
4,391
4,000
Total cash cost per ounce produced
$
(4.91)
$
0.59
$
(2.58)
$
1.48
Reconciliation to GAAP:
Total cash costs
$
(6,615)
$
881
$
(11,314)
$
5,928
Depreciation, depletion and amortization
3,318
3,117
9,463
8,331
Treatment & freight costs
(7,684)
(9,177)
(23,792)
(24,193)
By
-product credits (1)
30,772
21,520
82,298
54,234
Change
in product inventory (2)
(750)
506
(161)
718
Reclamation and other costs
50
49
145
146
Costs of sales and other direct production costs and
depreciation, depletion and amortization (GAAP)
$
19,091
$
16,896
$
56,639
$
45,164
Total cash costs (1)
$
9,681
$
14,073
$
35,405
$
39,844
Divided by gold ounces produced
18
37
68
111
Total cash cost per ounce produced
$
538
$
380
$
521
$
359
Reconciliation to GAAP:
Total cash costs
$
9,681
$
14,073
$
35,405
$
39,844
Depreciation, depletion and
amortization
2,627
7,229
11,824
18,686
Treatment & freight costs
(630)
(445)
(2,130)
(4,127)
By
-product credits (1)
120
555
1,849
1,980
Change in product inventory
(2,363)
(2,492)
(899)
1,619
Reduction in labor cost (4)
--
--
1,280
--
Shutdown-related costs at Mina Isidora
(5)
--
--
2,708
--
Reclamation and other costs
(291)
226
(76)
173
Costs of sales and other direct production costs and
depreciation, depletion and amortization (GAAP)
$
9,144
$
19,146
$
49,961
$
58,175
(Continued)
GOLD OPERATIONS (3)
SILVER OPERATIONS

GAAP Reconciliation to Cash Costs
GAAP Reconciliation to Cash Costs
Per Ounce
Per Ounce
HECLA MINING COMPANY
Reconciliation of Cash Costs per Ounce to Generally Accepted Accounting Principles (GAAP)(1)
(dollars and ounces in thousands, except per ounce –
unaudited)
Three Months Ended
Nine Months Ended
Sept. 30, 2007
Sept. 30, 2006
Sept. 30, 2007
Sept. 30, 2006
Total cash costs (1)
$
(1,575)
$
2,859
$
(641)
$
9,876
Divided by silver ounces produced
662
737
2,318
2,106
Total cash cost per ounce produced
$
(2.38)
$
3.88
$
(0.28)
$
4.69
Reconciliation to GAAP:
Total cash costs
$
(1,575
)
$
2,859
$
(641)
$
9,876
Depreciation, depletion and amortization
1,016
997
2,930
2,489
Treatment & freight costs
(3,251)
(3,942)
(10,581)
(10,220)
By-product credits (1)
13,776
8,678
37,743
20,049
Change in product inventory
(24)
(39)
(195)
(267)
Reclamation and other costs
6
3
18
14
Costs of sales and other direct production costs and
depreciation, depletion and amortization (GAAP)
$
9,948
$
8,556
$
29,274
$
21,941
Total cash costs (1)
$
(5,040)
$
(1,978)
$
(10,673)
$
(3,948)
Divided by silver ounces produced
679
759
2,073
1,894
Total cash cost per ounce produced
$
(7.42)
$
(2.61)
$
(5.15)
$
(2.08)
Reconciliation to GAAP:
Total cash costs
$
(5,040)
$
(1,978)
$
(10,673)
$
(3,948)
Depreciation,
depletion and amortization
2,302
2,120
6,533
5,842
Treatment & freight costs
(4,433)
(5,235)
(13,211)
(13,973)
By-product credits (1)
16,996
12,842
44,555
34,185
Change in product inventory
(726)
545
34
78
Reclamation and other costs
44
46
127
132
Costs of sales and other direct production costs and
depreciation, depletion and amortization (GAAP)
$
9,143
$
8,340
$
27,365
$
22,316
(Continued)
GREENS CREEK UNIT (Reflects Hecla’s 29.73% shar
e)
LUCKY FRIDAY UNIT

GAAP Reconciliation to Cash Costs
GAAP Reconciliation to Cash Costs
Per Ounce
Per Ounce
HECLA MINING COMPANY
Reconciliation of Cash Costs per Ounce to Generally Accepted Accounting Principles (GAAP)(1)
(dollars and ounces in thousands, except per ounce –
unaudited)
Three Months Ended
Nine Months Ended
Sept. 30, 2007
Sept. 30, 2007
Sept. 30, 2006
Total cash costs (1)
$
3,066
$
14,954
$
24,091
$
45,772
Depreciation, depletion and amortization
5,945
10,346
21,287
27,017
Treatment & freight costs
(8,314)
(9,622)
(25,922)
(28,320)
By-product credits (1)
30,892
22,075
84,147
56,214
Change in product inventory (2)
(3,113)
(1,986)
(1,060)
2,337
Reduction in labor cost (4)
--
--
1,280
--
Shutdown-related costs at Mina Isidora
(5)
--
--
2,708
--
Reclamation and other costs
(241)
275
69
319
Costs of sales and other direct production costs and
depreciation, depletion and amortization (GAAP)
$
28,235
$
36,042
$
106,600
$
103,339
(1)
Includes all direct and indirect operating cash costs related directly to the physical activities of producing
metals, including
mining, processing and other plant costs, third-party refining and marketing expense, on-site general and administrative costs,
royalties and mining production taxes, net of by-product revenues earned from all metals other than the primary metal produced
at each unit.
(2)
The change in product inventory for the nine months ended September 30, 2006 includes approximately $905,000 related to San
Sebastian cost of sales during the first quarter of 2006 for prior period doré
shipments.
(3)
Costs per ounce of gold are based on the gold produced by the La
Camorra mine and our Block B concessions, including Mina
Isidora, only.  During the quarters and nine-month periods ended September 30, 2007 and 2006, a total of 181 and 934 ounces,
and 2,882
and 3,366 ounces of gold, respectively, were produced from third-party mining operations located near the La
Camorra mine and Block B concessions.  The revenues from these gold ounces were treated as a by-product credit and included
in the calculation of gold costs per ounce.  Included in total cash costs for the three and nine months ending September 30, 2007
and 2006, were the costs to purchase the ore of approximately $0.2 million and $0.6 million, respectively, and $1.9 million and
$2.0 million, respectively.
(4)
Incentives have been offered at the La Camorra mine for voluntary reduction of the workforce.  During the nine months ended
September 30, 2007, these costs of sales and other direct production costs of $1.3 million were not included in the determination
of total cash costs for gold operations.
(5)
Operations at the Mina Isidora
mine in Venezuela were closed during a portion of the second quarter of 2007 when a small group
of local residents blocked Hecla employees from accessing the mine. Costs of sales and other direct production costs and
depreciation, depletion, and amortization totaling $2.7 million were incurred during the second quarter of 2007, and were not
included in the total cash costs for gold operations.
RECONCILIATION TO GAAP,
ALL OPERATIONS
Sept. 30, 2006

APPENDIX
Industry Fundamentals

3
4
5
6
7
8
9
10
11
12
13
14
15
Jan-00
Jan-01
Jan-02
Jan-03
Jan-04
Jan-05
Jan-06
Jan-07
average
year-on-
intra-
year
year
2006
$11.55
58.0%
42.7%
Jan-Oct 2007
$13.16
17.1%
10.1%
Source: GFMS Ltd.
The Silver Price –
The Silver Price –
US$/oz
US$/oz

70
80
90
100
110
120
130
140
Jan-07
Apr-07
Jul-07
Oct-07
Silver, Gold and Base
Silver, Gold and Base
Metals Prices
Metals Prices
Nickel
Copper
Silver
Zinc
Tin
Gold
Source: GFMS Ltd.
150

World Silver Demand
World Silver Demand
2006 Actual
2007 Forecast
Source: GFMS Ltd.
Industrial
47%
Photography
16%
Jewelry &
Silverware
25%
Coins
4%
Investment
7%
De-Hedging
1%
Industrial
51%
Photography
15%
Jewelry &
Silverware
25%
Coins
4%
Investment
5%

World Silver Supply
World Silver Supply
Mine
Production
70%
Scrap
21%
Government
Sales
9%
Mine
Production
74%
Scrap
20%
Hedging
2%
Government
Sales
4%
Source: GFMS Ltd.
Source: GFMS Ltd.
: GFMS Ltd.
2006 Actual
2007 Forecast

APPENDIX
Supplemental Hecla Mining
Information

2006      2005
Revenue
$217.4
$110.2
Gross Profit
$  73.4
$  14.5
Net Income (Loss)
$  69.1
$ (25.4)
Per share
$  0.57
$ (0.22)
Cash Flow Provided by
Operations
(before exploration and pre-development)
$  89.9
$  20.3
Exploration and pre-development
$  28.2
$  27.1
Cash Flow Provided by
(Used in) Operations  
$  61.5
$  (5.9)
(in millions except per share amounts)
2006 Financial Highlights
2006 Financial Highlights

Hollister Block Sold
Hollister Block Sold
Hollister sold to Great Basin Gold on  
April 19, 2007
$45 million cash and $18.6 million in GBG
stock
Hecla’s investment
$30 million
Booked a gain in second quarter of   
$63 million

2006
2007E
Lucky Friday
$    9
$   28
La Camorra
10
8
Greens Creek (29.73%)         8
10
Total
$ 27
$   45
Capital Expenditures
Capital Expenditures
(in millions)

14-year history in the heart of Mexico’s silver district. Good
presence, established team.
Underground expertise –
a strategic advantage in adding
value to maintain low-cost profile
More $ for silver exploration overall = more opportunities
for Hecla
-Gold acquisition advantage: a smaller threshold increases opportunities
Opportunity for Hecla being value-added
Ability to be part of large district (75 mil. equivalent silver
oz. potential)
Low-cost, high-margin operating future
Strengths
Criteria
Acquisitions:
Acquisitions:
Hecla has an Advantage
Hecla has an Advantage

La Camorra Unit
La Camorra Unit
Location:
Bolivar State,                                                  
Venezuela
2007 Estimate:
90,000-100,000
ounces gold
C
arac
as
P
uerto
Orda
z
La Camorra

Venezuela Property
Venezuela Property
Position
Position
Carac
as
PuertoOrdaz
MAP
AREA