The Seiko 2E20-7181 is a watch model based on the 2E20 movement.
Parts List
| SA1A45JN02 | crystal - crystal |
| SA1A45JN | crystal |
| 6M30B9NNG1 | crown - crown |
| 6M30B9NN | crown |
| 0H1600B01 | case back gasket - case back gasket |
| 0H1600B0 | case back gasket |
| 4235KB NL | band |
| 4235KB | band - band |
| 4235KB-LKG | band - link |
| 4235YB | band - metal band |
| 4235YB-LKG | band - link |
| 4235YB NL | band |
| 4235YB-BK4G | clasp - clasp |
| 4235KB-BK4G | clasp - buckle |
| 03L09DGH | others - hour hand |
| 03V09DGM | others - minute hand |
| 2E20718125A | others - case |
| 2E207181 | others - case back |
| 81606439 | others - bracelet fixing pin |
| 81604259 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 82870770 | others - case ring |
| 0351207 | others - winding stem |
| 0351205 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 2E202691XG14 | others - dial |
| 2E202691XS14 | others - dial |
| 2E202711XS14 | others - dial |
| 2E2062 | others - machine code |
Caliber 2E20
