![](https://coimages.sciencemuseumgroup.org.uk/291/710/large_thumbnail_1973_0528_0001__0003_.jpg)
Folding opera glasses, French patent, in velvet case
![Purple velvet case for folding pair of opera glasses, unsigned](https://coimages.sciencemuseumgroup.org.uk/383/586/medium_smg00083793.jpg)
Purple velvet case for folding pair of opera glasses, unsigned, Europe, 1850-1950
Details
- Category:
- Optics
- Object Number:
- 1990-286/2
- Materials:
- leather, wood (unidentified), brass (copper, zinc alloy) and velvet
- Measurements:
-
overall: .2456kg
case: 122 mm 50 mm,
- type:
- instrument case