The Seiko 4N00-6431 is a watch model based on the 4N00 movement.
Parts List
| SA1A47JN02 | crystal - crystal (inorganic) |
| SA1A47JN | crystal |
| 6M30B9NNG1 | crown - crown |
| 6M30B9NN | crown |
| 0H1800B01 | case back gasket - case back gasket |
| 0H1800B0 | case back gasket |
| 4236KQ | band - band |
| 4236YQ-LKG | band - link |
| 4236KQ-LKG | band - link |
| 4236YQ | band |
| 4236KQ-BK4G | clasp - buckle |
| 4236YQ-BK4G | clasp - clasp |
| 1CH040A1BAA | others - hour hand |
| 2CH060A1BAA | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81610279 | others - bracelet fixing pin |
| 4N00643125A | others - case |
| 82870810 | others - case ring |
| 4N006431 | others - case back |
| 4236KQ-EPG | others - endpiece |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 4236YQ-EPG | others - endpiece |
| 4N004281XS19 | others - dial |
| 4N004291XB14 | others - dial |
| 4N004291XG14 | others - dial |
| 4N004291XS14 | others - dial |
| 4N004471XB14 | others - dial |
| 4N0061 | others - machine code |
| 2CA060A1BNG | others - minute hand |
| 1CA040A1BNG | others - hour hand |