The Seiko 2B31-5000 is a watch model based on the 2B31 movement.
Parts List
| ET3N35LN01 | crystal |
| 35NM1NN1 | crown |
| 35NM1NS1 | crown |
| 0G1700B01 | case back gasket |
| 0G1750B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| Z5243G | band - metal band |
| Z5243S | band - metal band |
| Z5243G-BK5G | clasp - clasp |
| 07P27NSM | hand - minute hand |
| 07P31NGH | hand - hour hand |
| 07P31NGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 1AA042A1BNG | others - hour hand |
| 07SC25NG | others - second hand |
| 07P27DGM | others - minute hand |
| 2AA065A1BDG | others - minute hand |
| 2AA065A1BNG | others - minute hand |
| 1AA042A1BNS | others - hour hand |
| 2AA065A1BNS | others - minute hand |
| 2B310150XB14 | others - dial |
| 2B310150XG14 | others - dial |
| 2B310150XS13 | others - dial |
| 2B310160XB14 | others - dial |
| 2B310160XG14 | others - dial |
| 2B310160XS13 | others - dial |
| 2B310170X984 | others - dial |
| 2B310180X984 | others - dial |
| 2B310270XB14 | others - dial |
| 2B310270XG14 | others - dial |
| 2B3126 | others - machine code |
| 2B315000 | others - case back |
| 2B31500025 | others - case |
| 2B31500029 | others - case |
| 82812670 | others - case ring |
| B090AS | others - push pin |
| 1AE045LABNG | others - hour hand |
| 2AE065LABNG | others - minute hand |
| 07P31DGM | others - minute hand |
| 07SC25NS | others - second hand |
| 07P31DGH | others - hour hand |
Caliber 2B31





Other models with the same movement
| 2B31-0010 |
| 2B31-0020 |
| 2B31-5010 |
| 2B31-5039 |