The Seiko Y100-8009 is a watch model based on the Y100 movement.
Parts List
| 285W18GN00 | crystal |
| 35M82NF1 | crown |
| 86173340 | case back gasket - plastic gasket for crystal |
| 86567720 | crystal gasket - plastic gasket for crystal |
| 86569985 | bezel gasket - plastic gasket for bezel |
| 7BS9ZY | band - leather band |
| 82333184 | others - bezel |
| 82709960 | others - case ring |
| Y1008000XG18 | others - dial |
| Y1008000XN14 | others - dial |
| Y10080097S | others - case |
| Y10080097T | others - case |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 0354765 | others - winding stem |
| 0Z0060B01 | others - crown and stem gasket |
| 13C16NGM | others - minute hand |
| 13C16AGM | others - minute hand |
| 13C16NGH | others - hour hand |
| 13C16AGH | others - hour hand |