The Seiko 2P20-556A is a watch model based on the 2P20 movement.
Parts List
| ET1N31JV01 | crystal |
| 30NE3NA1 | crown |
| 0G1700B01 | case back gasket |
| 0G1750B01 | case back gasket |
| Q5017G | band - metal band |
| Q5017G-BK3G | clasp - clasp |
| 1CE032LABDG | others - hour hand |
| 2CE050L2BDG | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| T060BS | others - push pin |
| 2P201000XG16 | others - dial |
| 2P205560 | others - case back |
| 2P20556A25 | others - case |
| 82803190 | others - case ring |
| 05Y03DGM | others - minute hand |
| 05Y03DGH | others - hour hand |
Caliber 2P20
