The Seiko 8S21-6010 is a watch model based on the 8S21 movement.
Parts List
| 290W59LM01 | crystal |
| 35M81NA1 | crown |
| 35M97NA1 | crown |
| 0F260BAA3 | case back gasket - case back gasket |
| 86582730 | crystal gasket - plastic gasket for crystal |
| 86582750 | bezel gasket |
| 89951275 | band - other |
| B1521H | band - metal band |
| B1521H-LKG | band - link |
| B1521H-PB1 | clasp - parts for buckle/clasp |
| B1521H-BK1G | clasp - clasp |
| 11P01NGM | hand - minute hand |
| 2AB115A1BNG | others - minute hand |
| 1AB075A1BNG | others - hour hand |
| 3AA125F1ANG | others - second hand |
| 12SC39T1 | others - second hand |
| EB0055B01 | others - crown and stem gasket |
| 82333611 | others - bezel |
| 82801670 | others - case ring |
| 8430835A | others - dial ring |
| 8S2110 | others - machine code |
| 8S216000XA19 | others - dial |
| 8S216010 | others - case back |
| 8S216010XF | others - case |
| A160BS | others - push pin |
Other models with the same movement