'pop-eye' optical square, British, 1980-1985
- Made:
- 1980-1985 in United Kingdom
Optical square ('pop-eye') with black plastic case, unsigned, British,1980-1985
Details
- Category:
- Surveying
- Object Number:
- 1985-2228
- Materials:
- plastic (unidentified) and glass
- Measurements:
-
overall: 32 mm x 80 mm x 28 mm, .08kg
- type:
- optical square
- credit:
- Ordnance Survey