The Seiko 6539-5020 is a watch model based on the 6539 movement.
Parts List
| ES7N24GN00 | crystal |
| 35R34NS1 | crown - crown |
| 35R34NA1 | crown - crown |
| 0H2600N01 | case back gasket - case back gasket |
| NL | band |
Other models with the same movement
| 6539-5000 |
| 6539-5009 |
| 6539-5030 |
| 6539-5039 |
| 6539-5040 |
| 6539-5050 |
| 6539-5060 |
| 6539-5070 |
| 6539-5080 |
| 6539-5090 |
| 6539-5100 |
| 6539-5110 |
| 6539-5120 |
| 6539-5130 |
| 6539-5140 |
| 6539-6000 |
| 6539-7000 |