"New Optex" Datum Rule
- Made:
- 1930-1940 in United Kingdom
Spectacle frame gauge, made by John Baird & Sons.
Details
- Category:
- Ophthalmology
- Object Number:
- Y1997.9.24
- Materials:
- plastic (unidentified) and metal (unknown)
- Measurements:
-
overall: 13 mm x 204 mm x 100 mm,
- type:
- datum rule
- credit:
- Gift of Selby & Glover