The Seiko 2P21-0110 is a watch model based on the 2P21 movement.
Parts List
| 290N51AN01 | crystal |
| 40MW3NA1 | crown |
| 40MW3NS1 | crown |
| DZ0065B01 | case back gasket - button gasket |
| 0G2070B01 | case back gasket |
| 0D205BA11 | case back gasket |
| HK25B | band - leather band |
| HK26B | band - leather band |
| 0351238 | others - winding stem |
| 09SC43TG | others - second hand |
| 2P2101102E | others - case |
| 2P210110HE | others - case |
| 2P210360XS19 | others - dial |
| 2P210360XS29 | others - dial |
| 2P219 | others - machine code |
| 82811550 | others - case ring |
| 84308215 | others - dial ring |
| A180BS | others - push pin |
| 09SC43XA | others - second hand |
| 09T41DBH | others - hour hand |
| 09T41DBM | others - minute hand |
| 09T41DGH | others - hour hand |
| 09T41DGM | others - minute hand |
Caliber 2P21
