The Seiko 4N21-0200 is a watch model based on the 4N21 movement.
Parts List
| 240A02SN02 | crystal - crystal (sapphire) |
| 35MZ1NA1 | crown - crown |
| 0F220BAA3 | case back gasket - case back gasket |
| 0H2200B01 | case back gasket - rotating bezel gasket |
| AK15D | band - band |
| AB32B | band - band |
| 3AA125F1ANB | others - second hand |
| 3AA125F1ANG | others - second hand |
| 10T99JGH | others - hour hand |
| 10T99JGM | others - minute hand |
| 10SC23TB | others - second hand |
| 10T63JBM | others - minute hand |
| 10TA1JBH | others - hour hand |
| 10TA1JBM | others - minute hand |
| 1BH070A1BNB | others - hour hand |
| 0351157 | others - winding stem |
| 82351231 | others - bezel |
| 82843390 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 4N21020098 | others - case |
| 4N210200 | others - case back |
| 4N210470XS14 | others - dial |
| 4N210480XS19 | others - dial |
| 4N210490XS19 | others - dial |
| 4N2164 | others - machine code |
| A140BS | others - push pin |
| 10SC23T1 | others - second hand |