[jbsides]

Definitely many exceptions to that order of issuance, but it looks to be generally correct. I am also assuming the 63 - 69 is in reference to calender years, and not model years. I had one 69 SS that was ordered by the owner of Gledhill Chevrolet for his daughter that was built and delivered in September 69. It had XJZ 951, by the sequence above, 68. And IMO it varied widely by DMV location as some ran out sooner than others, etc. I still cannot explain why my 11/68 car has yellow on blue plates. The DMV said I cannot put them back on, and I cannot also explain why they were taken off. I'm just grateful YOM now goes back to 69.