Back may not be belong to the cases. These are good for learning.
Seiko Winding Stem 354615 6105A 6106A 6106B 6106C 6117A 6119A 6119B 6119C 6139A
Watch Movement, Three Hands Movement Movement Quartz Watch Movement, SL289575
New Watch Movement Week Calendar Dial Movement Spare Part For 8200 8205 Movement
Watch Movement Sweep Seconds Quartz Movement for VH31/VH31A/VH31B Movement
Repair Movement Quartz Watch Movement w/Battery For RONDA 585 Movement