The Seiko 2P20-0B4A is a watch model based on the 2P20 movement.
Parts List
| 205N16JM02 | crystal |
| 32M12EA1 | crown |
| 0A1900N01 | case back gasket - case back gasket |
| 0A1900N0 | case back gasket |
| ZJZ05G | band - leather band |
| 08Y06XDH | hand - hour hand |
| 08Y06XHM | hand - minute hand |
| A130AS | others - push pin (for lb) |
| 82800580 | others - case ring |
| 2P200B4A | others - case back |
| 2P200B4AHZ | others - case |
| 2P200H90XN22 | others - dial |
| 2P207 | others - machine code |
| 0351236 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 2P20
