I have never seen on that color either, the date code is 1964. It looks brand new except the little peeling, someone put a lot of effort into making this one look the way it does, even the yellow paint marks on it. I'll post another picture.
This is a steering box that I got with a parts lot of nos and repop A-Body parts. I was told it was NOS but I can not verify it. You be the judge. $175.00 plus the ride.