Clockmakers Whitworth,s Standard Thread Gauge. (38720)

A very clean steel Whitworth,s standard thread screw gauge, made by George Plumpton and stamped with their company logo and the Rd number. It has nine screw threads ranging from 1/16 to 5/16. Also has three squares for the tap head size. Overall length measures 10”, a very nicely made tool.

Price is inclusive of postage to mainland U.K.