The Seiko 5A54-2020 is a watch model based on the 5A54 movement.
Parts List
| RE4A39SN01 | crystal - crystal |
| 6M25Z1NDGA | crown |
| 6M25Z1SNWA | crown - crown |
| 0F220BA1S | case back gasket - case back gasket |
| CA46AW | band - band |
| CA48BW | band - band |
| 86209357 | band - other |
| 86209358 | band - other |
| 86209377 | band - other |
| 86209378 | band - other |
| 1CE075LABXX | others - hour hand |
| 2EE110LABHG | others - minute hand |
| 1CE075LABXW | others - hour hand |
| 2EE110LABHS | others - minute hand |
| 82722660 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 0354882 | others - winding stem |
| 81604341 | others - bracelet fixing pin |
| 5A545030XG14 | others - dial |
| 5A545030XS13 | others - dial |
| 5A548 | others - machine code |
| 81503021 | others - screw |
| 81503029 | others - screw |
| 5A54202061A | others - case |
| 81604349 | others - bracelet fixing pin |
| 5A542020 | others - case back |
| 5A54202075A | others - case |