The Seiko 6R21-00F0 is a watch model based on the 6R21 movement.
Parts List
| 380P13SN02 | crystal - crystal (sapphire) |
| 390P13S20A | crystal - crystal (sapphire) |
| 0D008BA11 | crown - crown and stem gasket |
| 9K80A9SNB0 | crown - crown (3h) |
| FE418BAD2 | case back gasket - case back gasket |
| 86585880 | crystal gasket - plastic gasket for crystal |
| 86586060 | crystal gasket - plastic gasket for crystal |
| 86622870 | bezel gasket - plastic gasket for bezel |
| L01D011M9 | band - leather band |
| L01D011M9BDB | band - leather without buckle |
| B1LW51SF00W | clasp - clasp |
| 1FA102FABE1 | hand - hour hand |
| 2FA150FBBE1 | hand - minute hand |
| 3BA035F0BN1 | hand - small hand (6h) |
| 3BA042F4BN1 | hand - small hand(3h) |
| 3BA055AABN1 | hand - small hand (9h) |
| 3BA157SABCJ | hand - second hand |
| 89927379 | others - casing spring |
| 0351200 | others - winding stem |
| 8R3920E | others - machine code |
| 6R2100F002A | others - case |
| 6R2100F002A-U | others - case back |
| 6R2100F0X91Z | others - dial |
| 6R2120E | others - machine code |
| 82450215 | others - bezel |
| S240CS | others - push pin |
Caliber 6R21
Other models with the same movement
| 6R21-00A0 |
| 6R21-00B0 |
| 6R21-00C0 |
| 6R21-00D0 |
| 6R21-00E0 |
| 6R21-00R0 |
| 6R21-01A0 |
| 6R21-01B0 |
| 6R21-01F0 |
| 6R21-01H0 |
| 6R21-01J0 |