The Seiko 1E20-0559 is a watch model based on the 1E20 movement.
Parts List
| 145W00HN01 | crystal |
| 145W00HN | crystal |
| 30M82NA1 | crown - crown |
| 0A1500N01 | case back gasket |
| EZ0035B0 | case back gasket |
| Z5271G | band |
| Z5271G-LKG | band - link |
| Z5271G-PB1 | clasp - parts for buckle/clasp |
| Z5271G-BK4G | clasp - clasp |
| 81181459 | others - bracelet fixing pipe |
| 82804440 | others - case ring |
| 81604219 | others - bracelet fixing pin |
| 1E200559 | others - case back |
| 1E20055975 | others - case |
| 1E201870XS14 | others - dial |
| 1E208 | others - machine code |
| 0351931 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 05VA0DGM | others - minute hand |
| 05VA0NGH | others - hour hand |
Caliber 1E20
