48-49-50 were externally identical. The stainless horizontal grille strips were usually 48. Looks like a 3/4 ton unit, 2WD, looks like normal bed length (not the 8-foot unit), add-on scuff plates on running boards, original single wiper, somebody has added amber park light lenses to the nose (clear ones originally), and a radio antenna (bets it's later radio and a 12V conversion as original 6V radios for this and Lincolns are hard to find loose anymore). May even have a sun roof. Bets are it isn't an original GN truck, but somebody restored it to be one. Dave
Almost all the GN trucks I've seen pics of, are usually Omaha Orange with Pullman Green front fenders.