The Seiko 4M71-0A21 is a watch model based on the 4M71 movement.
Parts List
| 0F260NAAS | case back gasket - case back gasket |
| GB46B | band - band |
| 81190055 | others - bracelet fixing pipe |
| 81611149 | others - bracelet fixing pin |
| 0Z0060B01 | others - crown and stem gasket |
Other models with the same movement
| 4M71-0A10 |
| 4M71-0A20 |
| 4M71-0A30 |
| 4M71-0A40 |