The Seiko 2Y01-5B20 is a watch model based on the 2Y01 movement.
Parts List
| BA3N24JM | crystal |
| BA3N24JM01 | crystal |
| 30M98NA1 | crown |
| 0H1610N01 | case back gasket |
| DZ0041B0 | case back gasket |
| 0H1610N0 | case back gasket |
| Z5303J | band - metal band |
| 07SC02NG | others - second hand |
| 0351236 | others - winding stem |
| 06T26ALH | others - hour hand |
| 2Y010G38XS19 | others - dial |
| 2Y015B20 | others - case back |
| 2Y015B202N | others - case |
| 2Y019 | others - machine code |
| 82812580 | others - case ring |
| A100AS | others - push pin |
| 06T26ALM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 2Y01
