The Seiko 4N00-6720 is a watch model based on the 4N00 movement.
Parts List
| K02A29JN02 | crystal - crystal (inorganic) |
| K02A29JN | crystal |
| 6M30B9NNG0 | crown - crown |
| 6M30B9NN | crown |
| 0H1800B01 | case back gasket - case back gasket |
| 0H1800B0 | case back gasket |
| 4420KZ | band - band |
| 4420BZ | band - band |
| 4420BZ-LKG | band - link |
| 4420KZ-LKG | band - link |
| 4420KZ-BK4G | clasp - buckle |
| 4420KZ-PB1 | clasp - parts for buckle |
| 4420BZ-BK4G | clasp - buckle |
| 4420BZ-PB1 | clasp - parts for buckle |
| 1CH042A1BNG | others - hour hand |
| 2CH060A1BNG | others - minute hand |
| 2CH060A1BAN | others - minute hand |
| 1CH042A1BAN | others - hour hand |
| 0351155 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81190875 | others - bracelet fixing pipe |
| 81607579 | others - bracelet fixing pin |
| 81190155 | others - bracelet fixing pipe |
| 82834330 | others - case ring |
| 4N00672025A | others - case |
| 4N006720 | others - case back |
| 4N00672025B | others - case |
| 4N004961XG14 | others - dial |
| 4N004970XS14 | others - dial |
| 4N004971XS14 | others - dial |
| 4N0061 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |