White oval Bright's patent bi-focal spectacle lens with triangular segment
- Made:
- 1912
White oval Bright's patent bi-focal spectacle lens with triangular segment, AD 1912.
Details
- Category:
- Optics
- Object Number:
- 1921-323/53
- Measurements:
-
overall: 41 x 32 mm
- type:
- ophthalmic lens
- credit:
- Dunscombe collection of spectacles