Original Barrel with arbor and mainspring, ready to be used

6119B 6119C 6139A 6139B 6308 6309A 6309B 6319A 6347A 6349A

Complete barrel with arbor: Seiko Part No. 205.613 (205 613)

Mainspring with slipping attachment: Seiko Part No. 401.615 (401 615)