Optically worked prism in borosilicate crown glass
- maker:
- Chance-Pilkington
Optically worked prism in borosilicate crown glass, by Chance-Pilkington, St. Asaph,Clwyd, Wales, 1980.
Optically worked prism in borosilicate crown glass, by Chance-Pilkington, St. Asaph,Clwyd, Wales, 1980.