The Seiko 5M63-0B20 is a watch model based on the 5M63 movement.
Parts List
| 300P04TN03 | crystal - crystal |
| 8K50E8SJW1 | crown - crown |
| FE298BAD2 | case back gasket - case back gasket |
| 86178610 | crystal gasket - plastic gasket for crystal |
| 86179051 | bezel gasket - plastic gasket for bezel |
| A35A06SAS0A | pusher - button |
| 45181G | band - band |
| 2AH110F0BSW | others - minute hand |
| 1AH075F0BSW | others - hour hand |
| 3AX120F0ASF | others - second hand |
| 83200273 | others - button spring clip |
| 81351630 | others - button spring |
| AD006BAD1 | others - crown and stem gasket |
| 82293809 | others - bezel |
| 0351653 | others - winding stem |
| 5M630B2061 | others - case |
| 5M630B20 | others - case back |
| 5M630B2061A | others - case |
| 0866780 | others - holding ring for dial |
| 0878672 | others - date dial |
| 45181G-LKPN | others - pin for link |
| 5M630B40XB19 | others - dial |
| 5M630B40XE19 | others - dial |
| 5M632 | others - machine code |
| 84327624 | others - dial ring |
| 84327625 | others - dial ring |
| S200BS | others - push pin |
Caliber 5M63
