Yes made in 1909, delivered around June of 09. This was in the first 10,000 Lugers delivered under contract after the adoption of the P.08 by the German army. The marking I’m not 100% sure but I could sort it out in some time. The regiment is a reserve regiment and I believe either Guard or Grenadier (but not guard grenadier as that is GG) but the 5 is probably the weapon number given the small size of the stamp not a regiment number. So the implication is there was only one guard reserve regiment or grenadier reserve regiment……I need to verify if either is the case. Basically it went to a reserve infantry regiment which plenty of these 1909 deliveries did.