The Seiko 1F21-0M00 is a watch model based on the 1F21 movement.
Parts List
| 180A02SN02 | crystal - crystal (sapphire) |
| 6K30A4SNSA | crown - crown (3h) |
| 0F170BAD2 | case back gasket - case back gasket |
| D1P3CZ | band - band |
| D1P3AZ | band - band |
| D1P3AZ-LK00 | band - link |
| D1P3CZ-LK00 | band - link |
| D1P3CZ-BK00 | clasp - clasp |
| D1P3AZ-BK00 | clasp - clasp |
| 3BA100F0BNS | others - second hand |
| 1BF055L1BDG | others - hour hand |
| 2BF077L1BDG | others - minute hand |
| 3BA100F0BNG | others - second hand |
| 2BF077L1BDS | others - minute hand |
| A100BS | others - push pin (for mb) |
| 1F210AV0XA13 | others - dial |
| 1F212C30XS14 | others - dial |
| 1F215 | others - machine code |
| 82822840 | others - case ring |
| 1F210M0001A | others - case |
| 1F210M00 | others - case back |
| 1F210M0002A | others - case |
| 0351807 | others - winding stem |
| AC004BAD1 | others - crown and stem gasket |
| D1P3AZ-BKPP | others - spring bar for buckle/clasp |
| D1P3AZ-EP00 | others - endpiece |
| D1P3AZ-LKPN | others - pin for link |
| D1P3CZ-BKPP | others - spring bar for buckle/clasp |
| D1P3CZ-EP00 | others - endpiece |
| D1P3CZ-LKPN | others - pin for link |
| 1BF055L1BDS | others - hour hand |