New York Standard Mainspring JA-502
$25.00
JA-502
Size 18, factory # 2190, width in mm 2.9, strength in mm 0.23, length inches 20, end T
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New York Standard Mainspring JA-506
$25.00
JA-506
Size 16, factory # 2249/3196, width in mm 2.45, strength in mm 0.22, length inches 20-1/2, end T
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New York Standard Mainspring JA-508
$25.00
JA-508
Size 12, factory # 4284, width in mm 1.83, strength in mm 0.2, length inches 18, end TONGUE
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New York Standard Mainspring JA-509
$25.00
JA-509
Size 12, factory # 4144, width in mm 1.9, strength in mm 0.22, length inches 19, end T
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New York Standard Mainspring JA-511
$25.00
JA-511
Size 10, factory # 7080, width in mm 1.5, strength in mm 0.19, length inches 17, end TONGUE
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