The Seiko 2Y01-5C50 is a watch model based on the 2Y01 movement.
Parts List
| RE1W44JM01 | crystal |
| RE1W44JM | crystal |
| 30MA2NA1 | crown - crown |
| 0A1800B01 | case back gasket |
| EZ0035B0 | case back gasket |
| G5120G | band |
| G5120G-BK5G | clasp - clasp |
| 07SC02NG | others - second hand |
| 0351236 | others - winding stem |
| 2Y010J90XB14 | others - dial |
| 2Y015C50 | others - case back |
| 2Y015C5075 | others - case |
| 2Y019 | others - machine code |
| 82801020 | others - case ring |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 05T14DAM | others - minute hand |
| 05T04DAH | others - hour hand |
Caliber 2Y01
