@gray490,
Talking straight, it's a very worthless effort. Nearly impossible to solve. The hang tag is from my understanding to only document depicting the final assembly date.
Are your two running threads in coincidence with your research on as SAS?
As mentioned: PRS does not feed archives.
I did a research on PRS 513, because in 2011 there are a bunch of guitars with differences in certain visible parts (nut, tuners). And I wanted to dig out a pattern, if there is an actual point, when they changed. My conclusion is - having the S/N and the spec details of nuts and tuners - that there is no pattern. It appears that the involved employees took that parts, which were accidently the first they grabbed in their assembly boxes.
PRS officially (though MODCAT + S/N would allow that) does not count their output, it's not possible even to pin point the quantity of all 513 made between 2004 and 2016.
PRS dates the production years and the continued numbering in that particular year. PRS does have an average output of 1,000 instruments a month.
You could only assume by the serial number, in which month the respective guitar was accomplished.