The Seiko 2B31-5010 is a watch model based on the 2B31 movement.
Parts List
| ET3N35LN01 | crystal |
| ET3N35LN | crystal |
| 35NM1NN1 | crown |
| 0G1700B0 | case back gasket |
| 0G1700B01 | case back gasket |
| 0G1750B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| 0G1750B0 | case back gasket |
| Z5242G | band - metal band |
| Z5242G-BK5G | clasp - clasp |
| 06P05AAM | hand - minute hand |
| 07P31NGH | hand - hour hand |
| 07P31NGM | hand - minute hand |
| 1AA040A1BAV | hand - hour hand |
| 2AA060A1BAW | hand - minute hand |
| 1AA042A1BNG | others - hour hand |
| 07SC25NG | others - second hand |
| 3BA075F1BNG | others - second hand |
| 07P27DGM | others - minute hand |
| 2AA065A1BDG | others - minute hand |
| 2AA065A1BNG | others - minute hand |
| 2AG060LABNG | others - minute hand |
| 1AG040LABNG | others - hour hand |
| 06SC11NG | others - second hand |
| 2B310170X994 | others - dial |
| 2B310170XG14 | others - dial |
| 2B310180X994 | others - dial |
| 2B310180XG14 | others - dial |
| 2B310190XB14 | others - dial |
| 2B310200XB14 | others - dial |
| 2B310210XS19 | others - dial |
| 2B310220XS19 | others - dial |
| 2B310270XB14 | others - dial |
| 2B310270XG14 | others - dial |
| 2B310280X994 | others - dial |
| 2B310280XG14 | others - dial |
| 2B3126 | others - machine code |
| 2B315010 | others - case back |
| 2B31501025 | others - case |
| 82812670 | others - case ring |
| B090AS | others - push pin |
| 1AE045LABNG | others - hour hand |
| 2AE065LABNG | others - minute hand |
| 07P31DGM | others - minute hand |
| 06P47NGM | others - minute hand |
| 06P47NGH | others - hour hand |
| 07P31DGH | others - hour hand |
Caliber 2B31





Other models with the same movement
| 2B31-0010 |
| 2B31-0020 |
| 2B31-5000 |
| 2B31-5039 |