The Seiko Y143-804A is a watch model based on the Y143 movement.
Parts List
| 290W56GN00 | crystal |
| 40M78NS1 | crown - crown |
| FH2981B01 | case back gasket - case back gasket |
| 0H3100B01 | case back gasket |
| 86569260 | crystal gasket - plastic gasket for crystal |
| 015LF | band - leather band |
| A200CS | others - push pin |
| 0354866 | others - winding stem |
| 0Z0060B01 | others - crown and stem gasket |