Three Pairs Safety Glasses to "BS 2092.1", with re

Made:
1963

Three Pairs Safety Glasses to "BS 2092.1", with red filter added to left eye-piece and blue filter to right eye-piece, as used with Williamson-Ross Multiplex Three-Projector Assembly

Details

Category:
Civil Engineering
Object Number:
1993-1557
credit:
Imperial College of Science & Technology (Dept. of Civil Engineering)
status:
Permanent collection

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