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Ptolemaic armillary sphere

1501-1600

Screwbarrel microscope, England, 1700-1730

1700-1730
Collapsible folding bellows field or stand camera fpr negatices 3 1/4 x 4 1/4". Double extension tapered leather bellows, swing and reversing back, rising and tilting front lens panel. With rack and pinion focusing. Fitted with a symmetrical Doublet lens F.8 5.5" f.1 lens mounted in front of a Thornton Pickard roller blind shutter. Mahogany with brass fittings. c.1885

Collapsible folding bellows field or stand camera, c 1885

1880-1890