Seiko Caliber 5Y31 No technical information found for this movement.Watches with the 5Y31 movement5Y31-10005Y31-100A5Y31-50005Y31-500A5Y31-50105Y31-50405Y31-50505Y31-50605Y31-50705Y31-50805Y31-50905Y31-51005Y31-510A5Y31-51105Y31-511A5Y31-51205Y31-51295Y31-51305Y31-51405Y31-51505Y31-51605Y31-51705Y31-52105Y31-52205Y31-52305Y31-52605Y31-52705Y31-52905Y31-529A5Y31-53095Y31-53205Y31-532A5Y31-53305Y31-53405Y31-53695Y31-5A305Y31-5A395Y31-5A405Y31-5A4A5Y31-5A505Y31-5A605Y31-5A705Y31-5A805Y31-5A8A5Y31-5A905Y31-5B095Y31-5B105Y31-5B205Y31-5B405Y31-5C205Y31-5C2A5Y31-60005Y31-60105Y31-60205Y31-60305Y31-60405Y31-604A5Y31-60505Y31-60605Y31-6A005Y31-6A205Y31-6A305Y31-6A405Y31-6A605Y31-6A705Y31-6A805Y31-70005Y31-70305Y31-70405Y31-7A305Y31-7A405Y31-80005Y31-80095Y31-80105Y31-80195Y31-80305Y31-80405Y31-8A005Y31-8A205Y31-8A295Y31-8A30