Seiko 310-020 Balance complete

Seiko 310-020 Balance complete.

Fit's Caliber: 7002A, 7005A, 7006A, 7009A, 7015A, 7016A, 7017A, 7018A, 7018B, 7019A, 7025A.

Original Seiko part in very good used condition. No damages, checked by profetional watchmaker. It's ready to us.

Thank you for your time and attention!