The Seiko 2E20-6139 is a watch model based on the 2E20 movement.
Parts List
| SAHN33JN01 | crystal |
| SAHN33JN | crystal |
| 32N23NA1 | crown |
| 32N23NN1 | crown |
| 0G1550B0 | case back gasket |
| 0G1550B01 | case back gasket |
| M5068G | band |
| M5068G-BK3G | clasp - clasp |
| T070BS | others - push pin |
| 2E201580XB14 | others - dial |
| 2E206130 | others - case back |
| 2E20613925 | others - case |
| 82823750 | others - case ring |
| 1CA025A3BNG | others - hour hand |
| 04L05DGH | others - hour hand |
| DA007BA11 | others - crown and stem gasket |
| 0351206 | others - winding stem |
| 04V05DGM | others - minute hand |
| 2EA040A3BNG | others - minute hand |
| 04V31NGM | others - minute hand |
| 1CA022A3BNG | others - hour hand |
Caliber 2E20
