The Seiko 1E50-521H is a watch model based on the 1E50 movement.
Parts List
| REBN46SR | crystal |
| REBN46SR01 | crystal - crystal (sapphire) |
| 30M66NA1 | crown |
| 0H1300N01 | case back gasket |
| DZ0041B0 | case back gasket |
| 0H1300N0 | case back gasket |
| Z5218S | band - metal band |
| Z5248S | band - metal band |
| 04V10DGM | others - minute hand |
| 81181859 | others - bracelet fixing pipe |
| 81606479 | others - bracelet fixing pin |
| 1E500400XS14 | others - dial |
| 1E50521H | others - case back |
| 1E50521H2N | others - case |
| 1E509 | others - machine code |
| 82810580 | others - case ring |
| 04V10NGH | others - hour hand |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E50
