Auction: Clocks, Watches & Scientific Instruments - 2623MLocation: MarlboroughDate / Time: December 01, 2012 10:00AM
Description:
36-inch Brass Rolling Parallel Bar, America or England, c. 1890, chamfered brass plate, with two knurled knobs flanking the raised ridge, two rotating grooved collars allow instrument to travel over chart.
Estimate $300-500