Alvan Clark & Sons 4-inch F/15 Refractor Telescope, Cambridgeport, Massachusetts, 19th/early 20th century, the 49-in. brass main tube engraved on ocular collar Alvan Clark & Sons Corpn Cambridgeport M

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Source SKINNER AUCTIONS, Boston & Marlborough, MA, USA

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Description

Alvan Clark & Sons 4-inch F/15 Refractor Telescope, Cambridgeport, Massachusetts, 19th/early 20th century, the 49-in. brass main tube engraved on ocular collar Alvan Clark & Sons Corpn Cambridgeport Mass, rack-and-pinion focusing, 12-in. finderscope, and dust cap, mounted on a #6 equatorial mount with geared slow motion setting circles marked PAT...

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