The Seiko 5P31-5A0A is a watch model based on the 5P31 movement.
Parts List
| SA8W36HM02 | crystal |
| 35M82NA1 | crown - crown |
| 0A2500N01 | case back gasket - rotating bezel gasket |
| 0A2500N | case back gasket |
| 86574220 | crystal gasket - plastic gasket for crystal |
| G1217G | band - metal band |
| G1217G-BK5G | clasp - clasp |
| 08T32ZAH | hand - hour hand |
| 08T32ZAM | hand - minute hand |
| 5P315A0A75 | others - case |
| 5P315A10XA25 | others - dial |
| 5P319 | others - machine code |
| 82800600 | others - case ring |
| 0351670 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 13SC04A2 | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |