[1960HDGMC]

Well I spoke with the fellow at Pilkington Glass today. They zipped me these date codes for 1958-1969. I do not know if they are GM wide, just GMC, or what. They seem to jive with what BarryGMC told me. TY for August 1959 and AY for Sept. 1959. I assume the month comes first and the year comes second. Hope the code helps somebody else out. Later, Greg Mead