The Seiko 5A50-5139 is a watch model based on the 5A50 movement.
Parts List
| RE7N46SM01 | crystal |
| 25M36NA4 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| BKA11 | band - leather band |
| 0354881 | others - winding stem |
| 05V28DGH | others - hour hand |
| 5A500150XB14 | others - dial |
| 5A505139EB | others - case |
| 5A509 | others - machine code |
| 82731960 | others - case ring |
| A140AS | others - push pin |
| 05V28DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 5A50
