The Seiko 1E20-0510 is a watch model based on the 1E20 movement.
Parts List
| 120N08JN01 | crystal |
| 120N08JN | crystal |
| 30M98NA1 | crown |
| 0H1100N0 | case back gasket |
| 0H1100N01 | case back gasket |
| DZ0041B0 | case back gasket |
| M5048G | band - metal band |
| M5048S | band - metal band |
| M5049G | band - metal band |
| M5050G | band - metal band |
| M5050G-BK3G | clasp - clasp |
| M5049G-BK3G | clasp - clasp |
| M5048G-BK3G | clasp - clasp |
| 04V18DGH | others - hour hand |
| 04V18DGM | others - minute hand |
| 0351931 | others - winding stem |
| 82724920 | others - case ring |
| 1E200510 | others - case back |
| 1E20051025 | others - case |
| 1E2005102N | others - case |
| 1E201690XG14 | others - dial |
| 1E201690XN14 | others - dial |
| 1E201700XS14 | others - dial |
| 1E201710XB14 | others - dial |
| 1E208 | others - machine code |
| T070AS | others - push pin |
| DZ0041B01 | others - crown and stem gasket |
| 04V04DGM | others - minute hand |
| 04V02DGM | others - minute hand |
| 05V08NGH | others - hour hand |
| 2CE040LMBDG | others - minute hand |
| 1CE030L2BDG | others - hour hand |
| 04V02DGH | others - hour hand |
| 1CE027LMBDG | others - hour hand |
Caliber 1E20
