The Seiko 1E20-0339 is a watch model based on the 1E20 movement.
Parts List
| 130N18JN01 | crystal |
| 130N18JN | crystal |
| 30M68NA1 | crown - crown |
| 0H1200N01 | case back gasket |
| 0H1200N0 | case back gasket |
| DZ0041B0 | case back gasket |
| B5317C | band - metal band |
| B5317G | band - metal band |
| B5317C-BK3G | clasp - buckle |
| B5317G-BK3G | clasp - buckle |
| 05V06DGH | others - hour hand |
| 82732560 | others - case ring |
| 1E20033925 | others - case |
| 1E200930XG14 | others - dial |
| 1E200930XN14 | others - dial |
| 1E208 | others - machine code |
| B5317C-EP2 | others - endpiece |
| B5317G-EP2 | others - endpiece |
| 0351931 | others - winding stem |
| 0354930 | others - winding stem |
| 05V06DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
