The Seiko 1E20-5220 is a watch model based on the 1E20 movement.
Parts List
| ESCN16GN00 | crystal - crystal |
| 30M68NA1 | crown - crown |
| 0H1000N01 | case back gasket - case back gasket |
| TT16A | band - band |
| 1E2052202N | others - case |
| 82730120 | others - case ring |
| 1E200500XG14 | others - dial |
| 1E208 | others - machine code |
| T060AS | others - push pin |
| 0351931 | others - winding stem |
| 03V08DGH | others - hour hand |
| 03V08DGM | others - minute hand |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
