The Seiko 1E20-0B30 is a watch model based on the 1E20 movement.
Parts List
| 100A01SN02 | crystal - crystal |
| 100N11SN01 | crystal - crystal |
| 25N09NS1 | crown |
| 0D100BA11 | case back gasket - case back gasket |
| 0G1050B01 | case back gasket - case back gasket |
| 1CA022A3BNS | others - hour hand |
| 82811270 | others - case ring |
| 1E200B3045 | others - case |
| 1E200B50XS19 | others - dial |
| DZ0040B01 | others - crown and stem gasket |
| 1CA025A3BNS | others - hour hand |
| 2EA035A3BDS | others - minute hand |
| 0354930 | others - winding stem |
| 04L03DSH | others - hour hand |
| 04V03DSM | others - minute hand |
Caliber 1E20
