The Seiko Y101-518A is a watch model based on the Y101 movement.
Parts List
| SA5W88GM02 | crystal |
| 40M78NS1 | crown - crown |
| FH2680B01 | case back gasket |
| 86568320 | crystal gasket |
| GA79A | band - metal band |
| 0354765 | others - winding stem |
| A180CS | others - push pin |
| 0Z0060B01 | others - crown and stem gasket |
| 09C74NGM | others - minute hand |
| 09C74NGH | others - hour hand |