The Seiko H601-521A is a watch model based on the H601 movement.
Parts List
| ES9W57LN00 | crystal |
| ES9W57LN | crystal |
| 40MP7NS1 | crown - crown |
| 40MP7NN1 | crown - crown |
| 0F260BAA | case back gasket |
| 0F260BAA3 | case back gasket - case back gasket |
| 86571850 | crystal gasket |
| 80605779 | pusher - button |
| 80605775 | pusher - button |
| Z1415G | band - metal band |
| Z1415G-LKG | band - link |
| Z1415S | band - metal band |
| Z1415G-PB1 | clasp - parts for buckle/clasp |
| Z1415G-BK1G | clasp - clasp |
| 07P17KSH | hand - hour hand |
| 07P17KSM | hand - minute hand |
| 07SC31XR | hand - second hand |
| 07SC31EB | others - second hand |
| 2AB070LCBLG | others - minute hand |
| 1AB050LEBLG | others - hour hand |
| 82810890 | others - case ring |
| 83200271 | others - button spring clip |
| EB0055B01 | others - crown and stem gasket |
| EG0060B01 | others - button gasket |
| 84308777 | others - dial ring |
| 84308778 | others - dial ring |
| A200BS | others - push pin |
| H601521A | others - case back |
| H601521A61 | others - case |
| H601521A75 | others - case |
| H601523LXG14 | others - dial |
| H601523LXS13 | others - dial |
| EB0055B0 | others - crown gasket |
| 07P17LGM | others - minute hand |
| 07P17LGH | others - hour hand |