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John Trotter (Manufacturer), Box of trial lens set, full apperture, 1880 - 1930.JPG&width=100&height=100)
Test lenses, ED.CS.2017.92 - 2John Trotter (Manufacturer), Box of trial lens set, full apperture, 1880 - 1930
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Test lenses, ED.CS.2017.93 - 3John Trotter, Pair of bifocal glasses in case, 1923 - 1966
glasses, ED.CS.2017.113 - 4John Trotter, Pair of bifocal glasses in case, 1923 - 1966
glasses, ED.CS.2017.113.2 - 5John Trotter, Bifocal spectacles in case, 1923 - 1966
glasses, ED.CS.2017.113.1