ETA Caliber 1256 Part Number 440 (Yoke Spring)

Eterna Caliber 1439 Part Number 440 (Yoke Spring)

Gruen Mainspring 215 220 291 295 330 380 415 440 430 440

AS Caliber 1475 Part Number 440 (Yoke Spring)

ETA Caliber 2452 Part Number 440 (Yoke Spring)

AS 1187 part 440 Yoke springs swiss made x 6 pieces

GRUEN FACTORY EB440 CAL215 SPRING SETTING NOS JEWELER WATCH REPAIR PART WP2

BESTFIT Mainspring 310E for Gruen caliber 440/770. 3 X 10 X 9.5 NOS (16A9R)