The Seiko 5E21-6B0A is a watch model based on the 5E21 movement.
Parts List
| 250W08SN01 | crystal |
| 35MF6NA1 | crown |
| 0A2500N0A | case back gasket - case back gasket |
| 86565960 | crystal gasket - plastic gasket for crystal |
| GA63B | band - metal band |
| 3AA125FMANG | others - second hand |
| 0351624 | others - winding stem |
| 1BH072L0BDG | others - hour hand |
| 82820420 | others - case ring |
| 5E215 | others - machine code |
| 5E216A80XS14 | others - dial |
| 5E216B0A | others - case back |
| 5E216B0A6Y | others - case |
| 87020283 | others - back plate |
| A160BS | others - push pin |
| 2BH105L0BDG | others - minute hand |
| EA0040B0A | others - crown and stem gasket |