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Genuine Hamilton Mainsprings

   
Genuine Hamilton Steel Mainspring 18 Size, Strength 3 1/4

T-Brace End
Dennison Strength 3 1/4

HAM-718012
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Steel Alloy Mainspring 18 Size, Strength 2 1/4

T-Brace End
Dennison Strength 2 1/4

HAM-718013
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton 18 Size Blue Steel Motor Barrel Mainspring

Old Style Motor Barrel Mainspring
For all 18 Size Hamilton Grades 942 and 944
Grade 940 after serial number 594500, Grade 941 after serial number 623000. Dennison Strength 4 1/2, Width (height) 3.18 mm, Length 25 1/4 inches

HAM-718010-OLD14
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 18 Size Blue Steel Motor Barrel Mainspring

New Style Motor Barrel Mainspring
For all 18 Size Hamilton Grades 942 and 944
Grade 940 after serial number 594500, Grade 941 after serial number 623000. Dennison Strength 4 1/2, Width (height) 3.18 mm, Length 25 1/4 inches

HAM-718014-OLD232
$15.00

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Genuine Hamilton Steel Alloy Mainspring 18 Size

T-Brace End
Dennison Strength 3 1/2

HAM-718011
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Steel Alloy Mainspring 16 Size

T-Brace End
Width 2.83 mm, Dennison Strength 3 3/4
Length 21 1/4 inches

HAM-718040
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Blue Steel Motor Barrel Mainspring 16 Size

Motor Barrel
Dennison Strength 7, Width (height) 2.83 mm, Length 20 3/4 inches

HAM-718044
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton Steel Alloy Mainspring 16 Size

T-Brace End
Dennison Strength 3 3/4

HAM-718043
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Steel Alloy Motor Barrel Mainspring 16 Size

Motor Barrel
Dennison Strength 6 1/2, Width (height) 2.83 mm, Length 20 3/4 inches

HAM-718046
$16.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton 16 Size Blue Steel Motor Barrel Mainspring Ht. 3.0 mm

Motor Barrel
Dennison Strength 6 3/4, Width (height) 3.0 mm, Length 25 1/2 inches

HAM-718050
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 16 Size Steel Alloy Motor Barrel Mainspring Ht. 3.0 mm

Motor Barrel
Dennison Strength 7, Width (height) 3.0 mm, Length 25 1/2 inches

HAM-718049
$16.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Steel Alloy Motor Barrel Mainspring 16 Size

Motor Barrel
Dennison Strength 6, Width (height) 2.83 mm, Length 20 3/4 inches

HAM-718048
$16.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton 16 Size Steel Alloy Motor Barrel Mainspring

Motor Barrel
Dennison Strength 6 1/4, Width (height) 2.83 mm, Length 20 3/4 inches

HAM-718047
$16.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Steel Alloy Motor Barrel Mainspring 16 Size

Motor Barrel
Dennison Strength 6 3/4, Width (height) 2.83 mm, Length 20 3/4 inches

HAM-718045
$16.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton Blue Steel Motor Barrel Mainspring 16 Size

Motor Barrel
Dennison Strength 6 1/2, Width (height) 3.0 mm, Length 25 1/2 inches

HAM-718051
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 16 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 6 1/2, Width (height) 2.83 mm, Length 20 3/4 inches

HAM-718046-BLUE
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 12 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 6 1/2, Width (height) 1.34 mm, Length 18 1/2 inches

HAM-718073
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 10 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 6, Width (height) 1.50 mm, Length 17 1/4 inches

HAM-718102
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton Steel Alloy Motor Barrel Mainspring 16 Size

Motor Barrel
Dennison Strength 6, Width (height) 1.50 mm, Length 17 1/4 inches

HAM-718101
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton 12/0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 9 1/4, Width (height) 1.18 mm, Length 14 1/2 inches

HAM-718400
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 14/0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 10, Width (height) 1.30 mm, Length 11 1/2 inches

HAM-718440
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 14/0 Size Steel Alloy Motor Barrel Mainspring

Motor Barrel
Dennison Strength 9 3/4, Width (height) 1.30 mm, Length 11 inches

HAM-718441-ALLOY
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


   
Genuine Hamilton 8/0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 12, Width (height) 1.50 mm, Length 13 3/4 inches

HAM-718271
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 7 1/2, Width (height) 1.38 mm, Length 14 inches

HAM-718140
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 0 Size Blue Steel Mainspring

Dennison Strength 7 1/2, Width (height) 1.38 mm, Length 14 3/4 inches

HAM-718141
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 0 Size Blue Steel Mainspring

Dennison Strength 7, Width (height) 1.38 mm, Length 14 3/4 inches

HAM-718142
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 6/0 Size Blue Steel Mainspring

Dennison Strength 8 1/2, Width (height) 1.34 mm, Length 10 inches

HAM-718200
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton Dynavar Alloy Mainspring 6/0 All Grades

Hamilton Grades 661, 662, 666, 667, 668, W800
Strength (Thickness) 0.117 mm

HAM-717202
$18.00

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Genuine Hamilton Dynavar Alloy Mainspring 6/0 All Grades

Hamilton Grades 661, 662, 666, 667, 668, W800
Strength 0.109 mm

HAM-717201
$18.00

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Genuine Hamilton 6/0 Size Steel Alloy Mainspring

Dennison Strength 9 1/4, Width (height) 1.34 mm, Length 11 1/2 inches

HAM-718201
$12.00

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Genuine Hamilton 6/0 Size Steel Alloy Mainspring

Dennison Strength 9 1/2 (1.25 mm), Width (height) 1.34 mm, Length 11 1/2 inches

HAM-718202
$12.00

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Genuine Hamilton Dynavar Alloy Mainspring 6/0 All Grades

Hamilton Grades 661, 662, 666, 667, 668, W800
Strength .104 mm

HAM-717200
$18.00

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Genuine Hamilton Dynavar Alloy Mainspring 6/0 All Grades

Hamilton Grades 661, 662, 666, 667, 668, W800
Strength (Thickness) 0.123 mm

HAM-717203
$18.00

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Genuine Hamilton 6/0 Size Blue Steel Mainspring 2621

Dennison Strength 10 (1.25 mm), Width (height) 1.34 mm, Length 11 1/2 inches

HAM-718203
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 8/0 Size Blue Steel Motor Barrel Mainspring 7221

Motor Barrel
Dennison Strength 12 1/2, Width (height) 1.50 mm, Length 13 3/4 inches

HAM-718270
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 8/0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Dennison Strength 11 1/2, Width (height) 1.50 mm, Length 13 3/4 inches

HAM-718272
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 18/0 Size Steel Alloy Mainspring

T Brace
Dennison Strength 12, Width (height) 1.12 mm, Length 10 1/4 inches

HAM-718502
$16.00

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Genuine Hamilton 18/0 Size Steel Alloy Mainspring

T Brace
Dennison Strength 12 1/2, Width (height) 1.12 mm, Length 10 3/4 inches

HAM-718501
$16.00

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Genuine Hamilton 20/0-21/0 Size Steel Alloy Mainspring

Tongue End
Dennison Strength 14 1/2 (0.65 mm), Width (height) 1.40 mm, Length 8 1/2 inches

HAM-718534
$16.00

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Genuine Hamilton 20/0-21/0 Size Steel Alloy Mainspring

Tongue End
Strength 0.675 mm, Width (height) 1.40 mm, Length 8 1/2 inches

HAM-718535
$16.00

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Genuine Hamilton Dynavar Alloy Mainspring 20/0 & 21/0 Sizes

Hamilton Grades 721-995-955A-997
Strength (Thickness) 0.076 mm

HAM-717530
$18.00

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Genuine Hamilton 20/0-21/0 Size Steel Alloy Mainspring

Tongue End
Strength 0.625 mm, Width (height) 1.40 mm, Length 8 1/2 inches

HAM-718533-BLUE
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 20/0-21/0 Size Blue Steel Mainspring

Tongue End
Dennison Strength 14 1/2 (0.65 mm), Width (height) 1.40 mm, Length 8 1/2 inches

HAM-718534-BLUE
$8.00

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Genuine Hamilton 20/0-21/0 Size Blue Steel Mainspring

Tongue End
Strength 0.675 mm, Width (height) 1.40 mm, Length 8 1/2 inches

HAM-718535-BLUE
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton Dynavar Alloy Mainspring 20/0 & 21/0 Sizes

Hamilton Grades 721-995-955A-997
Strength (Thickness) 0.082 mm

HAM-717532
$18.00

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Genuine Hamilton 20/0-21/0 Size Steel Alloy Motor Barrel Mainspring

Motor Barrel
Dennison Strength 12 1/2, Width (height) 1.00 mm, Length 8 1/2 inches

HAM-7185032
$16.00

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Genuine Hamilton 20/0-21/0 Size Steel Alloy Motor Barrel Mainspring

Motor Barrel
Dennison Strength 14 1/2, Width (height) 1.00 mm, Length 11 1/2 inches

HAM-7185030
$16.00

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Genuine Hamilton 20/0-21/0 Size Steel Alloy Mainspring

Tongue End
Strength 0.625 mm, , Width (height) 1.40 mm, Length 8 1/2 inches

HAM-718533
$16.00

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Genuine Hamilton Dynavar Alloy Mainspring 21/0 Size

Hamilton Grades 75-77-750-751-756-757-761
Strength (Thickness) 0.0675 mm

HAM-717571
$18.00

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Genuine Hamilton 22/0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Strength 0.7 mm, Width (height) 1.40 mm, Length 7 1/4 inches

HAM-718602-BLUE
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 22/0 Size Steel Alloy Motor Barrel Mainspring

Motor Barrel
Strength 0.7 mm, Width (height) 1.40 mm, Length 7 1/4 inches

HAM-718602-ALLOY
$16.00

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Genuine Hamilton 22/0 Size Blue Steel Motor Barrel Mainspring

Motor Barrel
Strength 0.65 mm, Width (height) 1.40 mm, Length 7 3/4 inches

HAM-718601
$8.00

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Quantity   1 - 2     3+  
Price $8.00 $6.00


   
Genuine Hamilton 22/0 Size Steel Alloy Motor Barrel Mainspring

Motor Barrel
Strength 0.60 mm, Width (height) 1.40 mm, Length 8 1/4 inches

HAM-718600
$16.00

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Genuine Hamilton Dynavar Alloy Mainspring 22/0 Size

Hamilton Grades 911-911M
Strength (Thickness) 0.0675 mm

HAM-717601
$18.00

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Genuine Hamilton Dynavar Alloy Mainspring 22/0 Size

Hamilton Grades 911-911M
Strength (Thickness) 0.07 mm

HAM-717602
$18.00

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Genuine Hamilton Dynavar Alloy Mainspring 22/0 Size

Hamilton Grades 911-911M
Strength (Thickness) 0.065 mm

HAM-717600
$18.00

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Genuine Hamilton Steel Alloy Mainspring 16 Size

T-Brace End
Width 2.83 mm, Strength (thickness) 0.18 mm
Length 21 1/4 inches

HAM-718041
$18.00

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Quantity   1 - 2     3+  
Price $18.00 $12.95


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Mailing Address: PO BOX 796, Oakland Ca. 94604
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