P.I.C. slide rule by A.G. Thornton Ltd
- Made:
- England
- maker:
- A G Thornton Limited
P.I.C. slide rule by A.G. Thornton Ltd, model no. 101/PC8, with patented differential scales, in box
P.I.C. slide rule by A.G. Thornton Ltd, model no. 101/PC8, with patented differential scales, in box
