The Stovebolt Site Forums The Shop Area General Truck Talk Vin Buster says it is a 1946 but it's not

I come up with a '48 3100 built in November. The "S" part of the code doesn't come up in my spec book. That part of the code should be a number, not a letter. I suppose "S" could be mistaken for a "5", in which case it would be out of the Kansas City, MO plant.