The Seiko 4N00-6551 is a watch model based on the 4N00 movement.
Parts List
| SA1A63JN02 | crystal - crystal |
| SA1A63JN | crystal |
| 6M30B9SNW0 | crown - crown |
| 6M30B9NNG1 | crown - crown |
| 6M30B9NN | crown |
| 6M30B9SN | crown |
| 0H1900B01 | case back gasket - case back gasket |
| 0H1900B0 | case back gasket |
| 4371KG | band - band |
| 4371YG | band - metal band |
| LOCAL | band - band |
| 4371JG | band - band |
| 4371JG-LKS | band - link |
| 4371KG-LKG | band - link |
| 4371YG-LKG | band - link |
| 4371JG-BK4S | clasp - buckle |
| 4371KG-BK4G | clasp - buckle |
| 4371YG-BK4G | clasp - buckle |
| 2CH065A1BAA | others - minute hand |
| 2CH065A1BNG | others - minute hand |
| 2CA065A1BNS | others - minute hand |
| 1CH045A1BNG | others - hour hand |
| 1CH045A1BAA | others - hour hand |
| 1CA045A1BNS | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 4N00655129A | others - case |
| 4N00655125A | others - case |
| 82871810 | others - case ring |
| 4N006551 | others - case back |
| 4N004631XB14 | others - dial |
| 4N004631XG14 | others - dial |
| 4N004631XS13 | others - dial |
| 4N004641XS19 | others - dial |
| 4N004651XS19 | others - dial |
| 4N0061 | others - machine code |
| A140BS | others - push pin |
| 1CA045A1BNG | others - hour hand |
| 2CA065A1BNG | others - minute hand |