The Seiko 1E20-0649 is a watch model based on the 1E20 movement.
Parts List
| 145W02SN01 | crystal |
| 145W02SN | crystal |
| 25M20NA4 | crown |
| 0F130NA12 | case back gasket - case back gasket |
| 0F130NA1 | case back gasket |
| WJA31G | band |
| 81180645 | band - bracelet fixing pipe |
| 81604549 | band - bracelet fixing pin |
| WJA32G | band - leather band |
| 82800180 | others - case ring |
| 86502325 | others - decorative plate |
| 81503025 | others - screw |
| 81503109 | others - screw |
| 0351931 | others - winding stem |
| 1E200649 | others - case back |
| 1E2006499T | others - case |
| 1E201900XS24 | others - dial |
| 1E208 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |
| 05V46ZGM | others - minute hand |
| 05V46ZGH | others - hour hand |
Caliber 1E20
