Automatic Mainsprings 0.50mm - 1.00mm

Mainspring, 0.63 x 0.100 x 340 x 9.00, AUTOMATIC, AP Audemars Piguet 2120 2121

Mainspring, 0.69 x 0.096 x 430 x 9.0, Manual, JLC 899

Mainspring, 0.70 x 0.105 x 280 x 8.50, AUTOMATIC, Omega 710, 711, 712 [GR2062-X]

Mainspring, 0.95 x 0.060 x 230 x 5.50, AUTOMATIC, Omega 660

Mainspring, 0.95 x 0.070 x 240 x 6.50, AUTOMATIC, Omega 670, 671, 672, 680, 681, 682 [GR2371-X]

Mainspring, 0.95 x 0.081 x 220 x 6.50, AUTOMATIC, Omega 683, 684, 685 [GR2373X]

Seiko 7009       Japanese Manufacture Mainspring 0.95 x 0.115 x 380 x 10.0 &nb…

Mainspring, 0.95 x 0.120 x 500 x 11.70, Omega 1010, 1012, 1020, 1022 [GR2378-1-X]

Mainspring, 1.00 x 0.096 x 335 x 8.50, AUTOMATIC