The Seiko H601-5420 is a watch model based on the H601 movement.
Parts List
| SAJN29JM01 | crystal |
| SAJN29JM | crystal |
| 35ME9NN1 | crown |
| 35ME9NA1 | crown |
| 0H2800B01 | case back gasket - rotating bezel gasket |
| 0H2800B0 | case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| 80609491 | pusher |
| ZRJ16G | band |
| 3BA125F1BNG | others - second hand |
| 09SC27NG | others - second hand |
| EG0060B01 | others - button gasket |
| 83200271 | others - button spring clip |
| 0351161 | others - winding stem |
| 08P63CGM | others - minute hand |
| 08P63CGH | others - hour hand |