The Seiko 4N00-6181 is a watch model based on the 4N00 movement.
Parts List
| ES3A09J20A | crystal |
| ES3A09J2 | crystal |
| 6M30B5NNG0 | crown - crown |
| 6M30B5NN | crown |
| 0H1500B01 | case back gasket - case back gasket |
| 0H1500B0 | case back gasket |
| 2CE045L0BDG | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 1CE030L2BDG | others - hour hand |