The Seiko 4N21-5290 is a watch model based on the 4N21 movement.
Parts List
| SA2A35SN02 | crystal - crystal |
| 6M35A9NNG1 | crown - crown |
| 6M35A9NNG2 | crown - crown |
| 0F150BA1S | case back gasket - case back gasket |
| DB96FW | band - band |
| DB94CW | band - band |
| 1BC032A1BNG | others - hour hand |
| 3BA075F1BNG | others - second hand |
| 1BC037A1BNG | others - hour hand |
| 2BC055A1BNG | others - minute hand |
| 2BC052A1BNG | others - minute hand |
| A100BS | others - push pin (for mb) |
| 4N212100XS14 | others - dial |
| 4N212110XG14 | others - dial |
| 4N2164 | others - machine code |
| 4N21529075A | others - case |
| 82834790 | others - case ring |
| 4N215290 | others - case back |
| 4N2152907NA | others - case |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |