The Seiko 2P21-0B70 is a watch model based on the 2P21 movement.
Parts List
| 170N04SN00 | crystal |
| 30M98NA1 | crown |
| 30M98NS1 | crown - crown |
| 0H1610N01 | case back gasket |
| 81924961 | clasp - clasp |
| 81924969 | clasp - clasp |
| 07SC02NG | others - second hand |
| 06T32DGH | others - hour hand |
| 0351236 | others - winding stem |
| 82801360 | others - case ring |
| 2P210B70 | others - case back |
| 2P210B7011 | others - case |
| 2P210B7025 | others - case |
| 2P210G90XG14 | others - dial |
| 2P210G90XS14 | others - dial |
| 2P219 | others - machine code |
| 06T32DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 2P21
