I have just bought a 66 gto convertible with a paint code of 12 and cant find this anywhere. Any help would be great

http://paintref.com/cgi-bin/colorcodedisplay.cgi?manuf=GM&year=1966&con=ym&rows=50

My 66 GTO data plate looks very similar to yours. Mine also has the 12 in the same location as yours. But the 12 isn't the body paint color, I don't know what that 12 means, I haven't been able to figure it out. The body paint color should be a letter, or two letters. My car is still painted its original color, Candelite Cream, which is a Y paint code. I found the Y down next to the right data plate rivet, like the machine that was creating the data plate moved to the next line or something.