The Seiko 2Y00-0400 is a watch model based on the 2Y00 movement.
Parts List
| 140A02JN02 | crystal - crystal |
| 140W09JN01 | crystal |
| 32M39NN1 | crown |
| 32M39NS1 | crown |
| 0F145BAA7 | case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| DT27A | band - metal band |
| DT28A | band - metal band |
| DT29A | band - metal band |
| 05Y41DGM | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81181459 | others - bracelet fixing pipe |
| 82823970 | others - case ring |
| 2Y00040075 | others - case |
| 2Y0004007E | others - case |
| 2Y0004007N | others - case |
| 2Y002380XG14 | others - dial |
| 2Y002380XL13 | others - dial |
| 2Y002380XS14 | others - dial |
| 2Y0065 | others - machine code |
| 0351236 | others - winding stem |
| 05Y41DSM | others - minute hand |
| 06Y03NGH | others - hour hand |
| 06Y03NSH | others - hour hand |
Caliber 2Y00
