The Seiko 9521-5020 is a watch model based on the 9521 movement.
Parts List
| ES4W02SN00 | crystal - crystal |
| 25M20NA3 | crown |
| 25M20NS3 | crown |
| 012600N01 | case back gasket - case back gasket |
| 86565400 | crystal gasket - plastic gasket for crystal |
| AB11A | band - band |
| AB10A | band - band |
| 09X08CSH | others - hour hand |
| 09X08CSM | others - minute hand |
| 12ST08CS | others - second hand |
| 09X08CGH | others - hour hand |
| 09X08CGM | others - minute hand |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 0354855 | others - winding stem |
| EZ0035B0A | others - crown and stem gasket |
| 82708980 | others - case ring |
| 95215020SF | others - case |
| 9521502061 | others - case |
| 12ST08DG | others - second hand |
| 95211 | others - machine code |
| 95215020X993 | others - dial |
| 95215020XG14 | others - dial |
| EZ0035B01 | others - crown and stem gasket |