The Seiko 1E20-2A20 is a watch model based on the 1E20 movement.
Parts List
| 110A12JR02 | crystal - crystal |
| 6M35A9NNG1 | crown - crown |
| 6M35A9NNW0 | crown |
| 0F100NA1S | case back gasket - case back gasket |
| D100AQ | band - band |
| D100BQ | band - band |
| 1CC027A0BNG | others - small hand (6h) |
| 1CC027A0BNS | others - small hand (6h) |
| 2CC040A0BNG | others - minute hand |
| 2CC040A0BNS | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351931 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 82722960 | others - case ring |
| 81190055 | others - bracelet fixing pipe |
| 1E202A2075 | others - case |
| 1E202A20 | others - case back |
| 1E202A207E | others - case |
| 1E205C20XS14 | others - dial |
| 1E205C20XZ13 | others - dial |
| 1E207 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
