The Seiko 1E20-3C80 is a watch model based on the 1E20 movement.
Parts List
| ES1A38JB0C | crystal - crystal |
| ES1A38JB0D | crystal - crystal |
| ES1A38JB0F | crystal - crystal |
| ES1A38JB0G | crystal - crystal |
| 30M82TA1 | crown - crown |
| 30M82NS1 | crown - crown |
| 0E190BA1S | case back gasket - case back gasket |
| C043BB | band - band |
| C044AB | band - band |
| C045BB | band - band |
| C046AB | band - band |
| C043BB-LK3 | band - link |
| C044AB-LK3 | band - link |
| C045BB-LK3 | band - link |
| C046AB-LK3 | band - link |
| C044AB-BKL | clasp - buckle |
| C044AB-PB2 | clasp - parts for buckle |
| C046AB-BK00 | clasp - clasp |
| C046AB-BKL | clasp - buckle |
| C046AB-PB2 | clasp - parts for buckle |
| C045BB-BKL | clasp - buckle |
| C045BB-PB2 | clasp - parts for buckle |
| C043BB-BKL | clasp - buckle |
| C043BB-PB2 | clasp - parts for buckle |
| 04V22DGH | others - hour hand |
| 04V22DGM | others - minute hand |
| 04V22DSH | others - hour hand |
| 04V22DSM | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 82837860 | others - case ring |
| 1E203C802E | others - case |
| 1E203C8025A | others - case |
| 1E203C8025 | others - case |
| 1E203C80 | others - case back |
| 0351931 | others - winding stem |
| 1E205D10XB14 | others - dial |
| 1E205D10XG14 | others - dial |
| 1E205D10XR14 | others - dial |
| 1E205D10XZ13 | others - dial |
| 1E207 | others - machine code |
| 1E203C802EA | others - case |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1E20
