The Seiko Y143-8020 is a watch model based on the Y143 movement.
Parts List
| 310T18ANS0 | crystal - crystal |
| 310T40ANG0 | crystal |
| 310T18ANG0 | crystal |
| 35MP0NC1 | crown |
| 35MP0NF1 | crown |
| FH2981B01 | case back gasket - case back gasket |
| 001ML | band - metal band |
| 003MF | band - metal band |
| 004MF | band - metal band |
| 005MF | band - metal band |
| 007LF | band - leather band |
| A180BS | others - push pin |
| 0354866 | others - winding stem |
| 0Z0060B01 | others - crown and stem gasket |