The Seiko 4N00-0321 is a watch model based on the 4N00 movement.
Parts List
| 170N25JM01 | crystal |
| 32M63NN1 | crown - crown |
| 0H1600B01 | case back gasket - case back gasket |
| Z5449L | band |
| Z5449J-LKS | band - link |
| Z5449L-LKG | band - link |
| Z5449J | band |
| Z5449L-BK4G | clasp - buckle |
| Z5449J-BK4S | clasp - clasp |
| 2CA070A1BNG | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 4N001221XB14 | others - dial |
| 4N001221XS14 | others - dial |
| 4N001231XS19 | others - dial |
| 4N0061 | others - machine code |
| T060BS | others - push pin |
| 82841030 | others - case ring |
| 4N00032129 | others - case |
| 4N000321 | others - case back |
| 0351155 | others - winding stem |
| 07Y07AGM | others - minute hand |
| 07Y07AGH | others - hour hand |
| 1CA047A1BNG | others - hour hand |