The Seiko 2E20-5139 is a watch model based on the 2E20 movement.
Parts List
| SAEN19JE10 | crystal |
| SAEN19JE | crystal |
| 32N23NA1 | crown |
| DA007BA1 | case back gasket |
| 0F130NA1 | case back gasket |
| 0F130NA11 | case back gasket |
| B5182G | band - band |
| B5182C | band - band |
| B5182C-BK3G | clasp - clasp |
| B5182G-BK3G | clasp - clasp |
| B5182G-EP2 | others - endpiece |
| B5182C-EP2 | others - endpiece |
| 2E200210XG14 | others - dial |
| 2E200210XS14 | others - dial |
| 2E20513925 | others - case |
| 2E2051392N | others - case |
| 82714150 | others - case ring |
| 04L05DGH | others - hour hand |
| 04V13DGM | others - minute hand |
| 1CG027LABDG | others - hour hand |
Caliber 2E20
