[dwcsr]

I was able to dig up that GM was 50 in 1958 and they dubbed that year the Golden Milesone. The cars were called The Golden Jubilee editions. Over the years GM has had many a 50 year anniversary for various cars and truck and mixed up a Anniversary Gold paint for each occasion. So it is possible that this truck is a Golden Jubile or anniversary edition for GM but not maybe not Chevy.