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Tim Unitas, 1912...
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"The Brical – Money Calculating Machine", c. ...
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"Antares" Cutaway Model...
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Curta "Type I" Calculator, 1948...
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Arithstyle, 1910...
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3 Calculating Machines...
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5 Early Brass Lenses, c. 1870–80...
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"Ensign" Regular Telephoto Lens, c. 1900...
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Shepherd Petzval-Type "Carte de Visite Lens",...
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Petzval-Type Portrait Lens by Horne & Thornth...
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13 Lenses by Aldis, 1901 onwards...
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5 Brass Lenses from England...
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![Stereoscopic Petzval-Type Portrait Lens, c. 1866\](./Uploads/ImageCache/x160/56cf2998c36f1.jpg "Stereoscopic Petzval-Type Portrait Lens, c. 1866\")
"Stereoscopic" Petzval-Type Portrait Lens, c....
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Compound Landscape Lens I. by J.T. Goddard, L...
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Petzval-Type Portrait Lens by C.E. Clifford, ...
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10 Portraits and Landscape Lenses from Englan...
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Portrait Lens 2C by W. Gregory & Co., "The Si...
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Watkins No. 6 Pinhole Lens, c. 1905...
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Nickeled Portrait Lens "Rectilinear" by Mario...
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Rapid Landscape Lens 8 ½ x 6 ½, c. 1865...
