J Wyke Boston Mass. U.S.A. Screw Cutting Centre Depth Guage No.1 Whitworth RARE. Patented Sept 11th 1883

This is the No.1 Whitworth version of this rare little guage. I would describe it as being in good used working condition with some minor scratches and marks. Come with 7/8 of original instruction leaflet this has been laminated.

It's about 2 inches long and 1 1/4 wide