What is the difference between 04 & 08 Lugers

[ithacaartist]

Main differences were '04: grip safety,no stock lug, long frame; '08: no grip safety, stock lug, short frame.

.30 Luger came first, 9mm later, I think around 1906. The Swiss bought .30's, and usually commercials were .30's. 9mm tested by US Army, and commonly German military. It depended, though on which market/contract they were being produced for, not on date/time, as you suggest.