The Seiko 1E20-5739 is a watch model based on the 1E20 movement.
Parts List
| ESGN36JN | crystal |
| ESGN36JN01 | crystal - crystal (inorganic) |
| 30M68NA1 | crown - crown |
| 0H1300N01 | case back gasket |
| 0H1300N0 | case back gasket |
| DZ0041B0 | case back gasket |
| B5364G | band - metal band |
| B5364G-BK3G | clasp - clasp |
| 04V22DGH | others - hour hand |
| 0351931 | others - winding stem |
| B5364G-EP2 | others - endpiece |
| 1E201200XG14 | others - dial |
| 1E205739 | others - case back |
| 1E20573925 | others - case |
| 1E208 | others - machine code |
| 82732380 | others - case ring |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 04V20DGM | others - minute hand |
Caliber 1E20
