Type III Rotary Horizontal Coil
2¢ Washington Head
Type III Perf 10
Rotary Coil
Type III Rotary Vertical Coil
Watermark Check and Type Check : If you have determined that your perf 10 coil is rotary and type III you will need to check for watermark. The type III rotary coils are a little easier than the others in that they are relatively common and there is no type III stock from which to manufacture fakes. Care must be taken with joint line pairs, however.
| Rotary Coil - Type III | Watermark | Number |
| Perf 10 horizontally (vertical coil) | single-line | 450 |
| Perf 10 horizontally (vertical coil) | none | 488 |
| Perf 10 vertically (horizontal coil) | single-line | 455 |
| Perf 10 vertically (horizontal coil) | none | 492 |
