A little more info...
The DC-4 made it's first test flight in 1938 and was in production from 1942 until 1946.
The ATC skin that Kristensen did and that I posted was an aircraft that was flying The Hump in 1945. Her tail number beginning in 0 indicates she was contracted for in 1940.....one of the early production aircraft.
Some of the other skins here have tail numbers that are puzzling to me in that the contract years don't seem to jibe with the contract and production span.
For example, the two MATS skins begin with 7 and 9. They could refer to '37 and '39, though that seems a bit early for a contract, and '47/'49 is outside possibility....unless these are DC-6 or DC-7 skins adapted to the DC-4. However, I may be making some silly mistake. Checking further.
OMG! OMG! I've turned into a 'rivet-counter', or rather a 'tail-number-tracker'....a fate worse than death.