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Bi-chromatic flip test 1950s? View |
Clement Clarke Ltd; Ever-Ready Mid-late 20th c. View |
Harry Freeman Mid-late 20th c. View |
Harry Freeman Mid-late 20th c. View |
Freeman Bichromatic Unit R. Archer & Sons Ltd Mid 20th c. View |
Freeman Binocular Bi-Chromatic Test & case Raphael's Ltd 20th c. View |
Mitchell, David W.A. Mid 20th c. View |