The Seiko 1F21-0BD0 is a watch model based on the 1F21 movement.
Parts List
| RE8A24SB0A | crystal - crystal (sapphire) |
| RE8A24SB0B | crystal - crystal (sapphire) |
| 6K40C6STGA | crown - crown (3h) |
| 6K40C6STWA | crown - crown (3h) |
| 0F180BAD2 | case back gasket - case back gasket |
| DA1A1JM | band - metal band |
| DA1A1SM | band - metal band |
| DA1A1SMLK | band - link |
| N0HN22SA00B | clasp - clasp |
| N0HN22SE02B | clasp - clasp |
| 2BA045LZBD1 | hand - minute hand |
| 2BA045LZBD2 | hand - minute hand |
| 1BA030LZBD1 | hand - hour hand |
| 1BA030LZBD2 | hand - hour hand |
| 3BA050F1BNG | others - second hand |
| 3BA050F1BNS | others - second hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81607579 | others - bracelet fixing pin |
| 81610279 | others - bracelet fixing pin |
| AC004BAD1 | others - crown and stem gasket |
| 1F210BD0 | others - case back |
| 1F210BD001A | others - case |
| 1F210BD002A | others - case |
| 1F210CF0XL15 | others - dial |
| 1F210CF0XS15 | others - dial |
| 1F213 | others - machine code |
| 82846260 | others - case ring |
| 0351807 | others - winding stem |