GCGhost... this is a chat forum, so forgive us of we "chat" about your guitar. It comes with the territory. You are of course correct about pot codes, but the reality is that a guitar can not be assembled before it's pots are manufactured, so although that date (on the pot) is not a definitive way to tell how late the guitar was made (because of bulk buys etc, etc.) it can help identify how early it is (or isn't). So if your Vette has a pot code from early 1963, then it seems reasonable to suggest the guitar is not a '62. That's all I'm saying.
Actually, and unlike Fender and Gibson who's production records still exist, there are no factory records in existence on Gretsch guitars from the 50s and 60s. They were reported to have been lost in the factory fire in 1973. So nobody can say with certainty "when" any batch of Gretsch guitars was shipped. So we tend to ignore calendar dating, and focus on model year dating (which is based on features). Luckily, Gretsch updated features on most of their models almost every year, so once you know the feature evolutions of a model, the serial number doesn't really matter, you can still determine the guitars model year. Also, much like auto manufacturers release their new cars for the next model year in the last few months of the previous calendar year, so did Gretsch with it's guitars. Another reason to reference "model year" instead. So it's highly possible that your Vette was actually made in late 1962. It may even have late '62 pot codes... but that truss rod cover on the headstock is a documented 1963 feature. So not knowing the serial number and batch origination (which you haven't shared) we have no reason to not think this is a '63 specimen, based on the features we can see on the guitar. But as I mentioned, it really doesn't matter on this particular guitar, it's just an opportunity to share information on the Corvette model for our Gretsch-Talk community.