I'm thinking that maybe this may be a '51. There are two wires and two bulbs in two sockets. Each socket is it's own wire.
Do they sell pigtails to tail lights? I want to replace the original crusty cloth wire coming out the back.
I bought this pickup as a 1950 but have found things as in brakes that are from a 1951. Either it was upgraded or the wrong year altogether. It was a Washington State Forest Service pickup.