The Seiko 1E20-3B30 is a watch model based on the 1E20 movement.
Parts List
| ES1A98JZ0A | crystal - crystal |
| ES1A98JZ | crystal |
| 30MF8NG1 | crown - crown |
| 0E150NA1S | case back gasket - case back gasket |
| EZ0035B0 | case back gasket |
| 4405CB | band - band |
| 4405LB | band - band |
| 4405BB | band - band |
| 4405KB | band - band |
| 4405BB-LKG | band - link |
| 4405CB-LKG | band - link |
| 4405KB-LKG | band - link |
| 4405LB-LKG | band - link |
| 4405BB-BKCG | clasp - buckle |
| 4405BB-PB2 | clasp - parts for buckle |
| 4405CB-BKCG | clasp - buckle |
| 4405CB-PB2 | clasp - parts for buckle |
| 4405LB-BKCS | clasp - buckle |
| 4405LB-PB2 | clasp - parts for buckle |
| 4405KB-BKCG | clasp - buckle |
| 4405KB-PB2 | clasp - parts for buckle |
| 04VC2NGM | others - minute hand |
| 04V06NGH | others - hour hand |
| 0351931 | others - winding stem |
| 1E203B302H | others - case |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1E203B3026 | others - case |
| 82837520 | others - case ring |
| 1E203B30 | others - case back |
| 1E205B60XG14 | others - dial |
| 1E205B60XS14 | others - dial |
| 1E205B68XG14 | others - dial |
| 1E205B68XS14 | others - dial |
| 1E207 | others - machine code |
| 4405BB-EPG | others - endpiece |
| 1E203B302HZ | others - case |
| 1E203B3026Z | others - case |
| 4405CB-EPG | others - endpiece |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1E20
