The Seiko YT57-0A40 is a watch model based on the YT57 movement.
Parts List
| 280P66LN03 | crystal - crystal |
| 1E50C8SNW1 | crown - crown |
| 0C3060B0A | case back gasket - case back gasket |
| 86177922 | crystal gasket - plastic gasket for crystal |
| F1E1JB | band - band |
| 1AX075F0BEL | others - hour hand |
| 2AX110F2BEL | others - minute hand |
| 3AX125F8AES | others - second hand |
| 0Z3114B02 | others - rotating bezel gasket |
| YT570A4061Y | others - case |
| 86317469 | others - rotating bezel |
| YT570A4061Z | others - case |
| C220FS | others - push pin |
| 0A0150B0A | others - crown and stem gasket |