The Seiko 4N00-1121 is a watch model based on the 4N00 movement.
Parts List
| 140A02J20A | crystal |
| 140A02J2 | crystal |
| 6M30B9NNG1 | crown - crown |
| 6M30B9NN | crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1500B0 | case back gasket |
| 4162MQ | band |
| 4162MQ-LKG | band - link |
| 4162MQ-BKCG | clasp - clasp |
| 1CE037LABDG | others - hour hand |
| 4162MQ-EPG | others - endpiece |
| 4N001121 | others - case back |
| 4N0011212HA | others - case |
| 4N004081XG14 | others - dial |
| 4N0061 | others - machine code |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81606679 | others - bracelet fixing pin |
| 82833415 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 2CE055L0BDG | others - minute hand |