The Seiko 4N21-0080 is a watch model based on the 4N21 movement.
Parts List
| 195W89SK01 | crystal |
| 32M83NA1 | crown |
| 32M83NS1 | crown |
| 0F170BAA1 | case back gasket |
| 0F170BAA3 | case back gasket - case back gasket |
| MK06E | band - leather band |
| MK07E | band - leather band |
| A130AS | others - push pin (for lb) |
| 4N210080 | others - case back |
| 4N21008075 | others - case |
| 4N2100807E | others - case |
| 4N210210XS1Z | others - dial |
| 4N210220XS1Z | others - dial |
| 4N2164 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 07SC69XL | others - second hand |
| 82840495 | others - case ring |
| 07T23RMM | others - minute hand |
| 07T33RMH | others - hour hand |
| 07T33RMM | others - minute hand |
| 07T51RMH | others - hour hand |
| 2BC075A1BAH | others - minute hand |