The Seiko 1231-5049 is a watch model based on the 1231 movement.
Parts List
| BA2W81SV | crystal |
| BA2W81SV01 | crystal |
| 25M15DA1 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0F170BAA | case back gasket |
| 0F170BAA3 | case back gasket - case back gasket |
| 86581050 | crystal gasket - plastic gasket for crystal |
| B5355H | band - metal band |
| B5355H-LKG | band - link |
| B5355H-PB1 | clasp - parts for buckle/clasp |
| B5355H-BK7S | clasp - clasp |
| 05SS053G | hand - second hand |
| 06S11VGH | hand - hour hand |
| 06S11VGM | hand - minute hand |
| 12310030XN1S | others - dial |
| 12315049 | others - case back |
| 12315049X9 | others - case |
| 123190 | others - machine code |
| 82802390 | others - case ring |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
Caliber 1231
Other models with the same movement
| 1231-0018 |
| 1231-0019 |
| 1231-0029 |
| 1231-0039 |
| 1231-0049 |
| 1231-5009 |
| 1231-5019 |
| 1231-5029 |
| 1231-5039 |