The Seiko 2E20-5550 is a watch model based on the 2E20 movement.
Parts List
| BA4N57JN | crystal |
| BA4N57JN01 | crystal |
| 32N23NA1 | crown |
| 0F130NA1 | case back gasket |
| 0F130NA11 | case back gasket |
| DA007BA1 | case back gasket |
| Z5166G | band - metal band |
| Z5166G-LKG | band - link |
| Z5166G-PB1 | clasp - parts for buckle/clasp |
| Z5166G-BK4G | clasp - clasp |
| 03L01DGH | hand - hour hand |
| 1CA020A3BNG | hand - hour hand |
| 03V01DGM | others - minute hand |
| 2EA032A3BDG | others - minute hand |
| 81180229 | others - bracelet fixing pipe |
| 81181459 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 81603979 | others - bracelet fixing pin |
| 2E200720XR14 | others - dial |
| 2E20555025 | others - case |
| 82731870 | others - case ring |
| DA007BA11 | others - crown and stem gasket |
| Z5166G-ES | others - eyelet screw |
Caliber 2E20
