The Seiko 1N00-0A90 is a watch model based on the 1N00 movement.
Parts List
| 180N10GN00 | crystal - crystal |
| 30M98NA1 | crown |
| 0H1610B01 | case back gasket |
| 0H1610B0 | case back gasket |
| B5584K-LKG | band - link |
| B5584L-LKG | band - link |
| B5584W-LKG | band - link |
| B5584L | band |
| B5584W | band |
| B5584K | band |
| B5584W-BK4G | clasp - buckle |
| B5584K-BK4G | clasp - buckle |
| B5584L-BK4G | clasp - clasp |
| 07Y25AGM | others - minute hand |
| 07Y25AGH | others - hour hand |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 1N000A9025Z | others - case |
| 82822700 | others - case ring |
| 1N000A90 | others - case back |
| 1N000A902EZ | others - case |
| 1N000E98XS24 | others - dial |
| 1N000F08X914 | others - dial |
| 1N000F08XB14 | others - dial |
| 1N000F08XG14 | others - dial |
| 1N000H78XS19 | others - dial |
| 1N009 | others - machine code |
| 0351807 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 2CB070A0BNG | others - minute hand |
| 07Y38NGM | others - minute hand |
| 1CB045A0BNG | others - hour hand |
| 07Y38NGH | others - hour hand |
Caliber 1N00
