The Seiko 4N21-5300 is a watch model based on the 4N21 movement.
Parts List
| 30M57NA1 | crown - crown |
| 0F140BA1S | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| XX000 | band - band |
| W345BZ | band - metal band |
| 1BC032A1BNG | others - hour hand |
| 3BA075F1BNG | others - second hand |
| 3BA050F1BNG | others - second hand |
| 2BC052A1BNG | others - minute hand |
| 0351155 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 4N21530075A | others - case |
| 82834730 | others - case ring |
| 81609619 | others - bracelet fixing pin |
| 4N215300 | others - case back |
| 4N212120XS14 | others - dial |
| 4N2164 | others - machine code |