The Seiko 1E20-0B20 is a watch model based on the 1E20 movement.
Parts List
| 100A01JN02 | crystal |
| 100N11HN01 | crystal |
| 25N09NA1 | crown |
| 25N09NS1 | crown |
| 0D100BA11 | case back gasket - case back gasket |
| 0G1050B01 | case back gasket - case back gasket |
| ZZ11A | band - metal band |
| ZZ12A | band - metal band |
| 82811270 | others - case ring |
| 1E200B2026 | others - case |
| 1E200B202F | others - case |
| 1E200B40XG14 | others - dial |
| 1E200B40XS14 | others - dial |
| 1CA025A3BNG | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 2EA035A3BDG | others - minute hand |
| 0354930 | others - winding stem |
| 04L03DGH | others - hour hand |
| 1CA022A3BNG | others - hour hand |
| 04V03DGM | others - minute hand |
Caliber 1E20
