| RSP-601 |
 |
Spectrometer 6" circle, 1
minute of an arc, vernier readable by two opposite verniers. |
| RSP-630 |
|
Spectrometer 6" circle, 30 seconds of an
arc, vernier readable by two opposite verniers. |
| RSP-701 |
|
Spectrometer 7" circle, 1 minute of an
arc, vernier readable by two opposite verniers. |
| RSP-730 |
|
Spectrometer 7" circle, 30 seconds of an
arc, vernier readable by two opposite verniers. |
| RSP-720 |
|
Spectrometer 7" circle, 10 seconds of an
arc, vernier readable by two opposite verniers. |
|
 Spectrometer
|
