The Seiko 1E20-0AY0 is a watch model based on the 1E20 movement.
Parts List
| RE1AN0SB0B | crystal - crystal (sapphire) |
| RE1AN0SB0C | crystal - crystal (sapphire) |
| 6M30AZSNG1 | crown - crown(6h) |
| 6M30AZSNG2 | crown - crown |
| 6M30AZSNN1 | crown - crown(6h) |
| 0F100BA1S | case back gasket - case back gasket |
| 4LM4KB | band - leather band |
| 4LM4NB | band - leather band |
| 4LM9PB | band - leather band |
| 2EA045L0BDG | others - minute hand |
| 2EA045L0BDS | others - minute hand |
| 1CA030L2BDG | others - hour hand |
| 1CA030L2BDS | others - hour hand |
| 81510581 | others - screw(3h) |
| 81510584 | others - screw(3h) |
| 81510585 | others - screw(3h) |
| 1E200AY0 | others - case back |
| 1E200AY001B | others - case |
| 1E200AY002B | others - case |
| 1E200AY003B | others - case |
| 81510569 | others - screw(6h) |
| DB004BAD1 | others - crown and stem gasket |
| 82722960 | others - case ring |
| 81190075 | others - bracelet fixing pipe |
| 81607599 | others - bracelet fixing pin |
| 0351931 | others - winding stem |
| 1E200AY8XB19 | others - dial |
| 1E200AY8XB29 | others - dial |
| 1E200AY8XY19 | others - dial |
| 1E207 | others - machine code |
Caliber 1E20
