The Seiko 2E20-5780 is a watch model based on the 2E20 movement.
Parts List
| ET1N19JV01 | crystal |
| ET1N19JV | crystal |
| 32N23NA1 | crown |
| 0F130NA1 | case back gasket |
| 0F130NA11 | case back gasket |
| DA007BA1 | case back gasket |
| Q5012C | band - metal band |
| Q5012C-LKG | band - link |
| Q5012C-BK4G | clasp - clasp |
| 2EA037A3BDG | hand - minute hand |
| 2EG037LBBDG | others - minute hand |
| 04L09DGH | others - hour hand |
| 04V11DGM | others - minute hand |
| 1CG022LABDG | others - hour hand |
| DA007BA11 | others - crown and stem gasket |
| 81181459 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 81603879 | others - bracelet fixing pin |
| 2E200930XG14 | others - dial |
| 2E200940XN14 | others - dial |
| 2E205780 | others - case back |
| 2E2057802E | others - case |
| 82801950 | others - case ring |
| Q5012C-EPG | others - endpiece |
| 2EA035A3BDG | others - minute hand |
| 1CA022A3BNG | others - hour hand |
| 04V03DGM | others - minute hand |
Caliber 2E20
