The Seiko 3M21-0A50 is a watch model based on the 3M21 movement.
Parts List
| BA1A04SB0A | crystal - crystal |
| 8M40A2SNG1 | crown - crown |
| 0F230NA1S | case back gasket - case back gasket |
| EG0115B01 | case back gasket - button gasket |
| 80604602 | pusher - button |
| D0P6AG | band - band |
| 1AB065L0BDG | others - hour hand |
| 2AB095L0BDG | others - minute hand |
| 3AA125FMANG | others - second hand |
| 81355429 | others - button spring |
| 81400709 | others - button spring clip |
| 0351550 | others - winding stem |
| 82835760 | others - case ring |
| 3M210A5061 | others - case |
| 3M210A50 | others - case back |
| 3M210A80XS14 | others - dial |
| 3M211 | others - machine code |
| A180BS | others - push pin |
| AD006BA12 | others - crown gasket |
Other models with the same movement