[Stocker]

Here I am... leddzepp has an excellent memory -- or did a bit of searching -- or both.

The black plates on my early '72 (built Aug. 1971) have a sequence of 12 345 A.

In fairness, I bought the truck in 1977, but there has been no indication of a repaint from blue. I have scraped, scratched, neglected, and generally abused them and not a speck of blue to be found. There was nothing customized or fancy about the truck -- it's a K20 with twin saddle tanks and 4:10 gears, and had split rims with 8-ply 7.50-16s when I got it. The PO had installed (and removed) an equalizer hitch. Hardly the type of truck someone would strip the paint from the plates and respray from bare metal, imo.