The Seiko 8Y21-0021 is a watch model based on the 8Y21 movement.
Parts List
| 160A02JN02 | crystal - crystal (inorganic) |
| 35M75NN1 | crown |
| 0G1820B09 | case back gasket - case back gasket |
| M5089K | band - metal band |
| 1AA042A1BNG | others - hour hand |
| 2AA065A1BNG | others - minute hand |
| 3BA075F1BNG | others - second hand |
| 82739350 | others - case ring |
| 8Y21002125A | others - case |
| 8Y210111XG14 | others - dial |
| 8Y2183 | others - machine code |
| B090BS | others - push pin |
Caliber 8Y21
