The Seiko 2B21-5000 is a watch model based on the 2B21 movement.
Parts List
| ESYN67AN01 | crystal |
| 35NM1NA1 | crown |
| 0G1700B01 | case back gasket |
| 0G1750B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| N5007G | band - metal band |
| N5007G-BK3G | clasp - clasp |
| 06P01DGH | hand - hour hand |
| 06P01DGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 1AA040A1BNG | others - hour hand |
| 2AA060A1BNG | others - minute hand |
| 2AG060LABNG | others - minute hand |
| 1AG040LABNG | others - hour hand |
| 06SC11NG | others - second hand |
| 2B210010XG14 | others - dial |
| 2B210020XL14 | others - dial |
| 2B214 | others - machine code |
| 2B21500025 | others - case |
| 82730310 | others - case ring |
| B090AS | others - push pin |
| 06P47NGM | others - minute hand |
| 06P47NGH | others - hour hand |
Caliber 2B21
Other models with the same movement
| 2B21-5010 |
| 2B21-5020 |