The Seiko 2Y00-5121 is a watch model based on the 2Y00 movement.
Parts List
| REJN09JN01 | crystal |
| REJN09JN | crystal |
| 32N23NA1 | crown |
| 32N23NN1 | crown |
| 0G1700B01 | case back gasket |
| 0G1700B0 | case back gasket |
| DA007BA1 | case back gasket |
| Z5276K | band - metal band |
| Z5276K-BK3G | clasp - clasp |
| 05Y05AGH | hand - hour hand |
| 05Y05CGH | hand - hour hand |
| 05Y09AGM | hand - minute hand |
| 05Y37NGH | hand - hour hand |
| A110BS | others - push pin (for mb) |
| 2Y000601XG14 | others - dial |
| 2Y000611XS19 | others - dial |
| 2Y000621XS14 | others - dial |
| 2Y005120 | others - case back |
| 2Y00512125 | others - case |
| 2Y0065 | others - machine code |
| 82820730 | others - case ring |
| DA007BA11 | others - crown and stem gasket |
| 05Y01DGH | others - hour hand |
| 05Y05DGH | others - hour hand |
| 05Y01DGM | others - minute hand |
| 05Y05NGM | others - minute hand |
Caliber 2Y00
