The Seiko 1N01-0K20 is a watch model based on the 1N01 movement.
Parts List
| 160A02JN02 | crystal - crystal (inorganic) |
| 6M35B3NNG0 | crown - crown |
| 0F150BA1S | case back gasket - case back gasket |
| 4C85BZ | band - band |
| 4C87BZ | band - band |
| 4HN9KB | band - leather band |
| 4HN7KB | band - leather band |
| 1AB047A1BNG | others - hour hand |
| 2AB065A1BNG | others - minute hand |
| 1AE040LMBNG | others - hour hand |
| 2AE060LABNG | others - minute hand |
| 3BA075F1BNG | others - second hand |
| A100BS | others - push pin (for mb) |
| 1N010HL8XB14 | others - dial |
| 1N010HL8XG14 | others - dial |
| 1N011N50XB14 | others - dial |
| 1N011N50XG14 | others - dial |
| 1N014 | others - machine code |
| 1N010K2001A | others - case |
| 82841720 | others - case ring |
| 1N010K20 | others - case back |
| 0351807 | others - winding stem |
| 1N010K2001D | others - case |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1N01
