Finally arrived! The build card came and now we know a bit more about the truck.
Also, I took a picture of the frame number below. It is located below the spare tire and have some meaning. I know the final number "81" means it is a short frame without winch.
Also, from the built card, the body model 19 means it came without a radio from the factory. So this is a WC-56 as we gessed.
Also, you can see that the painting has been damaged. I`ll post more info and some pictures soon.