Folding opera glasses, French patent, in velvet case
Folding opera glasses, French patent, unsigned, Europe, 1850-1950
Details
- Category:
- Optics
- Object Number:
- 1990-286/1
- Materials:
- leather, brass (copper, zinc alloy) and glass
- Measurements:
-
overall: .2456kg
opera glasses: 11 mm 35 mm,
- type:
- opera glasses and binoculars