For many years, I have wondered why the serial numbers of guitars (not just Gretsch's) was seemingly such a complicated matter...and what the "big deal" was, about them! It has always seemed that there was no standard "formula" for denoting the location of manufacture, the date of manufacture, the code indicating the year/month of manufacture, etc. because in order to determine these things, one has to do a fair amount of research and investigation. It is almost as though the manufacturer were trying to "hide" (or disguise) these seemingly innocuous facts about the instrument!
What's the "big deal"...does anybody know why this would be such a "problem" for the manufacturer, and/or why they all seem to use a different formula for denoting what would seem to be reasonably straightforward facts about an individual guitar? I mean, if a guitar was built on the 1st of July, in 1991, in Nashville, Tennessee, etc.
WHY don't they simply stamp it something simple, like -07-01-1991, Nash- ??

As anybody who has ever been to Las Vegas can tell you, there is no theoretical limit to numerical and letter combinations, so it couldn't have anything to do with "running out" of numbers and/or letters! Inquiring minds would like to know!
David