Farmer J.
Well-known member
Here's a device my Mother uses for measuring distances on maps. The dial is calibrated according to the scales of the Ordnance Survey. You 'drive' the little wheel along the map route you are intending to travel and read the distance on the dial. I think this one is 1940's.
I do have a 1990's one which is calibrated for the modern metric map scales, and the glass is still nice and clear. It's in my Land Rover but I can't be bothered to go out in to the rain for it..
I do have a 1990's one which is calibrated for the modern metric map scales, and the glass is still nice and clear. It's in my Land Rover but I can't be bothered to go out in to the rain for it..
















It must be from around 1990, it was new when they changed over from round fuses to the 2 pronged blade type.
