The Seiko 1N01-5G20 is a watch model based on the 1N01 movement.
Parts List
| K02A83JN03 | crystal - crystal |
| 35MR9NH1 | crown - crown |
| 35MR9NS1 | crown - crown |
| 0F160BA1S | case back gasket - case back gasket |
| FFH7JZ | band - band |
| FFH8KZ | band - band |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 1AA050A1BAA | others - hour hand |
| 1AA050A1BAC | others - hour hand |
| 2AA070A1BAA | others - minute hand |
| 2AA070A1BAC | others - minute hand |
| A120BS | others - push pin (for lb) |
| 1N015G2001 | others - case |
| 82796360 | others - case ring |
| 1N015G2002 | others - case |
| 0351807 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1N01
