The Seiko 1N01-5H20 is a watch model based on the 1N01 movement.
Parts List
| K02A64JN02 | crystal - crystal |
| 6M40B4SNW1 | crown - crown |
| 0F150BA1S | case back gasket - case back gasket |
| 30M2JZ-LK2 | band - link |
| 30M2JZ | band - band |
| 30M2JZ-BKF | clasp - buckle |
| 1BF027AMBNS | others - hour hand |
| 2BF040AMBNS | others - minute hand |
| 3BA075F0BNS | others - second hand |
| DB004BAD1 | others - crown and stem gasket |
| 0351807 | others - winding stem |
| 81611939 | others - bracelet fixing pin |
| 81190875 | others - bracelet fixing pipe |
| 82837320 | others - case ring |
| 1N015H2001 | others - case |
| 1N015H20 | others - case back |
| 1N011W98XB13 | others - dial |
| 1N011W98XL13 | others - dial |
| 1N011W98XS13 | others - dial |
| 1N019 | others - machine code |
Caliber 1N01
