The Seiko 1E20-5490 is a watch model based on the 1E20 movement.
Parts List
| RE8N42JM01 | crystal - crystal (inorganic) |
| 30M68NA1 | crown - crown |
| 0H1200N01 | case back gasket |
| Z5163C | band - metal band |
| Z5163C-BK5G | clasp - buckle |
| 03V12DGH | others - hour hand |
| 03V12DGM | others - minute hand |
| 0351931 | others - winding stem |
| Z5163C-EP2 | others - endpiece |
| 82723480 | others - case ring |
| 1E200910X994 | others - dial |
| 1E205490HE | others - case |
| 1E208 | others - machine code |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
