Three Small Brass Compound Monocular Microscopes, late 19th/early 20th century, the first, boxed, on three-foot base marked "J. ZENTMAYER/PHILA/PAT'D AUG 15 '76," supporting a stage with clips and plano/concave mirror, ht. 11 in.; the second, boxed, on gold-painted U-shaped base supporting a mirror and black-painted stage with clips, rackwork coarse focusing, ht. 10 1/2 in.; the third a Society of Arts pattern example with shaped green-painted base, square stage with clips, rackwork focus, ht. 10 in.
Three Small Brass Compound Monocular Microscopes, late 19th/early 20th century, the first, boxed, on three-foot base marked "J. ZENTMAYER/PHILA/PAT'D AUG 15 '76," supporting a stage with clips and plano/concave mirror, ht. 11 in.; the second, boxed, on gold-painted U-shaped base supporting a mirror and black-painted stage with clips, rackwork coarse focusing, ht. 10 1/2 in.; the third a Society of Arts pattern example with shaped green-painted base, square stage with clips, rackwork focus, ht. 10 in.
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
