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$34.95 JA-201 JA-201 Alloy Mainspring Hamilton 18 Size old Hamilton # 15 new number 718013. Grades 924, 925, 926, 927, 928, 929, 930, 931, 932, 933, 934, 935, 936, 937, 938, 939, 948 Some movement of the following grades take this mainspring. Grade 940 before serial number 594501, Grade 941 before serial number 623001. After these serial numbers grades 940 and 941 take a motor barrel mainspring which is unavailable in alloy. width in mm 2.85, strength in mm 0.21, length inches 21-1/4, end T |
HAM-718010-OLD14
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$34.95 JA-204 Size 16, Grade 950B, 952. 960 992, 992E, 992B. Old Hamilton number # 534B new number 718050 Replaces Hamilton Dynavar steel spring old numbers 35433, 35434, 35435 and new numbers 717040, 717041, 717042. Width in mm 3, strength in mm 0.155, length inches 23-1/2, end D.B.
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$45.00 JA-206 Size 16 Grades 954, 962, 963, 966, 967, 972, 974, 973. Hamilton old steel spring number 317 new number 718042 Width in mm 2.85, strength in mm 0.19, length inches 21-1/4, end T
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$39.00 JA-209 Size 12, all grades including 912. Hamilton old steel numbers 1228 & 3028 new old spring number 718071 Would replace new numbers 718070 & 718073 that are no longer made. Width in mm 1.7, strength in mm 0.18, length inches 21-1/4, end D.B.
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$34.95 JA-210 Size 10 grades 917, 921, 923, 945. Old steel spring number 6021 new old spring number 718101 Hamilton Dynavar quality steel spring old number 20434 new number 717102 This is the only strength 10 size Hamilton made in the white alloy line and would replace old numbers 20432, 20434, and new numbers 717100, 717102, 718100, 718102. Width in mm 1.5, strength in mm 0.17, length inches 17-1/2, end M.B.
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$34.95 JA-213 Size 6/0 Grades 986, 988, Old Hamilton steel spring part numbers 1721 & 1921 the new new is 718200 Width in mm 1.35, strength in mm 0.105, length inches 10, end T
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$34.95 JA-215 Size 6/0 Grades 986A, 987, 987A 987E, 987F, 987S Hamilton old part numbers for reg. steel spring 2321 & 2521 New numbers for these same old steel springs are 718201 & 718202 This White Alloy Spring would replace all the Hamilton Dynavar springs old numbers 27432, 27433, 27434, 27435 new numbers 717200, 717201, 717202, 707203 Width in mm 1.4, strength in mm 1.25 length inches 11.5, end T
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$34.95 JA-217 Size 6/0 Grades 979 Hamilton old part number for reg. steel spring is 2621 and the number was 718203. This White Alloy Spring would replace all the Hamilton Dynavar springs old numbers 27432, 27433, 27434, 27435 new numbers 717200, 717201, 717202, 707203 Width in mm 1.35, strength in mm 0.115, length inches 11, end T
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$34.95 JA-220 Size 12/0 Grade 401 Old Hamilton steel spring # 4128 new #718400. Width in mm 1.18, strength in mm 0.125, length inches 14-1/2, end T
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$34.95 JA-226 Size 18/0, factory # 2721/718501, width in mm 1.1, strength in mm 0.09, length inches 11, end T 
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$34.95 JA-229 Size 20/0&21/0, factory # 2921/718531, width in mm 1, strength in mm 0.08, length inches 9, end T-BRACE
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JA-230 Size 20/0&21/0, factory # 36434/717532, width in mm 1, strength in mm 0.09, length inches 9, end T-BRACE. No longer available. Use JA-229. |
$34.95 JA-232 Size 22/0, factory # 6221/718601, width in mm 1.4, strength in mm 0.07, length inches 8, end T-BRACE
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Genuine Hamilton Mainsprings Some as Low as $8.00 each. |
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Otto Frei, Watch Parts Since 1930 Customers Entrance 126 2nd St. Oakland, California 94607 Mailing Address: PO BOX 796, Oakland Ca. 94604 Freight Shipment Address: 119 3rd St. Oakland Ca. 94607 USA
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