The Seiko 3B21-0AZ0 is a watch model based on the 3B21 movement.
Parts List
| DA2E2PM | band - metal band |
| DA2E2RMLK | band - link |
| DA2E3JM | band - metal band |
| DA2E3JMLK | band - link |
| DA2E2PMLK | band - link |
| DA2E2RM | band - metal band |
| H18H12SA00B | clasp - clasp |
| H18H12SA01B | clasp - clasp |
| H18H12SE00B | clasp - clasp |
| S130BS | others - push pin |
| DA2E2PMEP | others - endpiece |
| 81190875 | others - bracelet fixing pipe |
| 81601489 | others - bracelet fixing pin |
| DA2E2RMEP | others - endpiece |