Hi all - This Portuguese acceptance stamped Luger followed me home, and I’d like to learn as much as possible about it. It’s in great shape, came with a leather holster (no tools), and an unmarked Mag w/wood base. The pistol is serial # 484, all numbered parts that I see are matching, but there is no M2 or crown crest on top of the chamber. The left side of the frame is marked with an “s”, and there are Portuguese acceptance stamps on the underside of the barrel, left side of frame, and back of pistol above the lanyard ring. Is this a common pistol, and are there known variations of the Portuguese Lugers that don’t have the crest on top of the chamber? Any way to determine the production date? Thanks in advance, I look forward to the responses!