The Seiko 6539-5120 is a watch model based on the 6539 movement.
Parts List
| RE6N18GN00 | crystal |
| 35R34NS1 | crown - crown |
| 35R34NA1 | crown - crown |
| 0H2702N01 | case back gasket - case back gasket |
| BRJ24G | band - leather band |
| 09T04N1H | others - hour hand |
| 0354765 | others - winding stem |
| 82708140 | others - case ring |
| 0801598 | others - date dial |
| 6539512025 | others - case |
| 65395210XG14 | others - dial |
| 65399 | others - machine code |
| A200BS | others - push pin |
| 2BA090A0BNG | others - minute hand |
| 09T18NGM | others - minute hand |
Other models with the same movement
| 6539-5000 |
| 6539-5009 |
| 6539-5020 |
| 6539-5030 |
| 6539-5039 |
| 6539-5040 |
| 6539-5050 |
| 6539-5060 |
| 6539-5070 |
| 6539-5080 |
| 6539-5090 |
| 6539-5100 |
| 6539-5110 |
| 6539-5130 |
| 6539-5140 |
| 6539-6000 |
| 6539-7000 |