The Seiko M421-5030 is a watch model based on the M421 movement.
Parts List
| ESBW23FN | crystal |
| ESBW23FN01 | crystal |
| EA0090B0A | case back gasket - button gasket |
| EA0090B0 | case back gasket |
| FE318BAA | case back gasket |
| FE318BAA1 | case back gasket - case back gasket |
| 86582070 | crystal gasket - plastic gasket for crystal |
| 80609255 | pusher |
| 83200279 | pusher - button spring clip |
| 80609259 | pusher |
| ZLM27 | band |
| Z1385H | band - metal band |
| Z1385H-LKS | band - link |
| Z1385S | band - metal band |
| Z1385H-PB1 | clasp - parts for buckle/clasp |
| Z1385H-BK1S | clasp - clasp |
| 81351070 | others - button spring |
| 0806092 | others - holding ring for dial |
| 81350480 | others - button spring |
| 83200379 | others - button spring clip |
| A200CS | others - push pin |
| M42110 | others - machine code |
| M4215030 | others - case back |
| M421503061A | others - case |
| M421503061B | others - case |
| M421503061C | others - case |
| M42150309969 | others - panel cover |
| M42150309979 | others - panel cover |
| M42150309989 | others - panel cover |
| M42150309999 | others - panel cover |
| M4215030WZ | others - case |
Other models with the same movement