I think a big problem (for lack of a better term) in this has to do with Roddenberry and Jefferies both being Army Air Corps guys. If the designer had been a Navy man, we would've gotten a more logical hull number system (something like CHE-1701, designating the Enterprise as a heavy cruiser explorer), instead of this idea that Jefferies had that draws from aircraft design rather than ship registries (his scheme only works if NCC-1701 was the model of starship the Enterprise was, with the refit being an NCC-1701A, like the difference between a P-51A and a P-51D).
So, do yourselves a favor, kids, don't even try and figure out Jefferies' registry scheme; it doesn't work. It was just a half-finished idea he threw out there and never fleshed out. Leave it be.
So, do yourselves a favor, kids, don't even try and figure out Jefferies' registry scheme; it doesn't work. It was just a half-finished idea he threw out there and never fleshed out. Leave it be.