The Seiko 1E20-3C10 is a watch model based on the 1E20 movement.
Parts List
| RE2A38JR02 | crystal - crystal |
| 40M96NJ1 | crown - crown |
| 40M96ND1 | crown - crown |
| 0E120NA1S | case back gasket |
| 0E120BA1S | case back gasket - case back gasket(lower) |
| 44R1KZ | band - band |
| 44R1JZ | band - band |
| 44R1JZ-LK2 | band - link |
| 44R1KZ-LK4 | band - link |
| 44R1KZ-BKN | clasp - buckle |
| 44R1JZ-BKK | clasp - buckle |
| 03V12DGH | others - hour hand |
| 03V12DGM | others - minute hand |
| 02V04NGH | others - hour hand |
| 02V04NSH | others - hour hand |
| 03V28NGM | others - minute hand |
| 03V28NSM | others - minute hand |
| 0351931 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 82722120 | others - case ring |
| 81190055 | others - bracelet fixing pipe |
| 1E203C1025Z | others - case |
| 1E203C10 | others - case back |
| 1E205B78XS24 | others - dial |
| 1E205B88XG19 | others - dial |
| 1E205B88XS19 | others - dial |
| 1E207 | others - machine code |
| 1E203C1029Z | others - case |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1E20
