The Seiko 6M13-0020 is a watch model based on the 6M13 movement.
Parts List
| 310A03SN02 | crystal - crystal |
| 310A03SN | crystal |
| 45MA9NA1 | crown |
| 0F260BAA3 | case back gasket - case back gasket |
| 0F260BAA | case back gasket |
| DB0055B01 | case back gasket - crown and stem gasket |
| 80631311 | pusher |
| WPK20G | band - band |
| 04PE03AG | hand - sub hand |
| 3AX120FAAAM | others - second hand |
| 2AX115FCBAM | others - minute hand |
| 2DF030AABAA | others - sub hand |
| EG0060B01 | others - button gasket |
| 83200219 | others - button spring clip |
| 0351168 | others - winding stem |
| DB0050B01 | others |
| 81505076 | others - case back screw |
| 82852750 | others - case ring |
| 0351169 | others - winding stem |
| 0801466 | others - date dial |
| 6M130020 | others - case back |
| 6M13002093 | others - case |
| 6M130020XS14 | others - dial |
| 6M130030XS14 | others - dial |
| 6M1321 | others - machine code |
| A180BS | others - push pin |
| 1AX085FBBAL | others - hour hand |
Caliber 6M13
Other models with the same movement
| 6M13-0010 |
| 6M13-0014 |
| 6M13-0019 |
| 6M13-7000 |
| 6M13-7010 |
| 6M13-7020 |
| 6M13-702A |
| 6M13-7039 |
| 6M13-7040 |
| 6M13-7060 |