The Seiko 8S21-6020 is a watch model based on the 8S21 movement.
Parts List
| 295W65LM01 | crystal |
| 295W65LM02 | crystal |
| 35M81NA1 | crown |
| 35M97NA1 | crown |
| 0F260BAA3 | case back gasket - case back gasket |
| 86583770 | crystal gasket |
| 86170500 | bezel gasket - plastic gasket for bezel |
| 89951275 | band - other |
| G1311C | band - metal band |
| G1311D | band - metal band |
| G1311D-BK5S | clasp - clasp |
| G1311C-BK5S | clasp - clasp |
| 11P01NGM | hand - minute hand |
| 1AB075A1BNG | others - hour hand |
| 1AA080A1BNG | others - hour hand |
| 3AA125F1ANG | others - second hand |
| 12P01NGM | others - minute hand |
| 12SC39T1 | others - second hand |
| 3AA125F3ANG | others - second hand |
| 82340011 | others - bezel |
| 82801670 | others - case ring |
| 8430871A | others - dial ring |
| 8S2110 | others - machine code |
| 8S216000XA19A | others - dial |
| 8S216020 | others - case back |
| 8S216020TP | others - case |
| 8S216020X4 | others - case |
| A160BS | others - push pin |
| EB0055B01 | others - crown and stem gasket |
Other models with the same movement