The Seiko 1N00-1A90 is a watch model based on the 1N00 movement.
Parts List
| 185A08JB0A | crystal |
| 185A08JB0B | crystal |
| 185A08JB0C | crystal |
| 185A08JB | crystal |
| 30MA2NA1 | crown - crown |
| 0E170NA1S | case back gasket - case back gasket |
| 0E170NA1 | case back gasket |
| 4072PG-LKG | band - link |
| 4072QG-LKG | band - link |
| 4072QG | band |
| 4072PG | band |
| 4072QG-BK4G | clasp - clasp |
| 4072PG-BK4G | clasp - clasp |
| 1CG042L0BDG | others - hour hand |
| 2CG070L0BDG | others - minute hand |
| 0351807 | others - winding stem |
| T060BS | others - push pin |
| 82832420 | others - case ring |
| 1N001A90 | others - case back |
| 1N001A90HEX | others - case |
| 1N001A90HEY | others - case |
| 1N001A90HEZ | others - case |
| 1N004B98XB14 | others - dial |
| 1N004B98XG14 | others - dial |
| 1N004B98XN14 | others - dial |
| 1N004B98XS14 | others - dial |
| 1N009 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |
Caliber 1N00
