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Box of 'Perfection' two-part bifocal oval spectacle lenses Early 20th c. View |
Box of oval spectacle lenses Bausch & Lomb Optical Company Early 20th c. View |
Box of oval spectacle lenses c.1917 View |
five trial lenses / stenopaeic slits 20th c. View |
lens baton no. 101 "Purple Smokes" Pilkington; Crookes, William; M. Wiseman & Company Ltd View |
lens baton no. 103 "Greenish Smokes" View |
lens baton no. 105 "Reddish-Brown Smokes" View |
lens baton no. 107 "Neutral Grey Smokes" View |
lens baton no. 108 "Neutral Grey Smokes" View |
lens baton no. 109 "Slightly-smoked brown-green" Hallauer View |
lens baton no. 111 "Brownish Green" View |
lens baton no. 112 "Chlorophylls or Fieuzal etc." View |
lens baton no. 113 "Euphos" View |
lens baton no. 115 "Amber-Greens" View |
lens baton no. 116 "Hygett" Hygett View |
lens baton no. 117 "Grass-Greens" View |
lens baton no. 118 "Grass-Greens" View |
lens baton no. 120 "Emerald Greens" View |
lens baton no. 121 "Lemon-Ambers" View |
lens baton no. 124 "Brownish Ambers" View |
lens baton no. 125 "Brownish Ambers" View |
lens baton no. 127 "Brownish Ambers" View |
lens baton no. 129 "Signal Peacock Green (Spectrum Green)" View |
lens baton no. 131. View |
lens baton no. 132 "Blue" View |
lens baton no. 133 "Amethyst" Crookes View |
lens baton no. 135 "Crookes Experimental" Crookes View |
lens baton no. 137 "Crookes" Crookes View |
set of tinted lenses British American Optical Company Ltd; Essel; Zeiss; Combined Optical Industries Ltd Mid 20th c. View |
Unused 'Punktisken' spectacle lenses Nitsche & Gunther Early-Mid 20th c. View |