Mainsprings

1.30 x 0.125 x 360 Swiss Mainspring

4 1/2 x 10 x 11 Swiss Made Mainspring DB End.  1.30 x 0.11 x 280.  GR3281-DB Bestfit MSS-4510KS Fits Poljot/Vostok 2408, 2409, 2409A, 2414, 2414A  

American Pocket Watch Mainsprings

Bestfit White-A-Loy Automatic Mainsprings

Quality Swiss & European Made Generic Mainsprings for popular Omega calibers

Quality Swiss Made Generic Rolex Mainsprings for all popular calibers.

6 x 9 1/2 x 12 1/2 White-a-Loy mainspring

Dennison: 8 x 9 1/2 x 13 1/2 Metric 1.70 x .12 x 340mm

MSS-WA41 Automatic Mainspring (GR3983X) Swiss Made
White-A-Loy Size 5 1/2 x 10 x 13 3/4 /  1.45 x .11 x 320

Fits Seiko Movement #s: 2501A, 2501B, 2501C 2505A, 2505B, 2516B 2517A, 2517B Measurements: 1.05 x 0.075 x 260 / 1.5 x 13 10.5 (auto)

Fits Seiko Movement #s: 460 Measurements: 1.05 x 0.12 x 380 / 1.5 x 12.5 x 14.5

Fits Seiko Movement #s: 60M, Goldfeather Measurements: 1.15 x 0.115 x 360 / 2.5 x 10.5 x 15.5