Mainsprings

2 x 13 x 6.5 1.10 x 0.08 x 180 GR2576 Bestfit MS-213W

3 x 14 x 19.5 2.30 x 0.205 x 500 GR6446 Bestfit MS-143X

8 x 9.5 x 13.5 170 x 0.12 x 340 GR4936 Bestfit MS-89P

6 x 6 x 16 1.50 x 0.18 x 420 GR4312 Bestfit MS-65V

2 x 8 x 13.5 1.10 x 0.135 x 340 GR2680 Bestfit MS-28P

2.00 x .075 x 400 Manual Swiss Mainspring / 11″ x 14″ x 15″ GR5714

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  

1.30 x 0.125 x 360 Swiss Mainspring

Bestfit White-A-Loy Automatic Mainsprings

Quality Swiss & European Made Generic Mainsprings for popular Omega calibers

American Pocket Watch Mainsprings

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