Vintage Crosby Steam Pressure Gauge Tester 3505 With Custom Made Hinged Case

Vintage and genuine Crosby Steam Gauge & Valve Company, model 3505 pressure gauge testing equipment. Has a patent date of 1884 and comes with its original custom made hinged mahogany case. Has some residue from storage, otherwise still in excellent shape. I presume this had a bottom which was lost and appears there are some weights and other parts missing.

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