Doing my usual Friday afternoon gunshop snooping, I saw a P220 that had some unusual (to me) proof marks on the right side of the frame just above the front of the trigger guard, and three other proofmarks just forward of the frame on the bottom of the slide. I checked some of the other SIGs in the display case and didn't see the same marks. Also, instead of Exeter on the left side of the slide it says "Tysons Corner - VA" Hmmmm.... Since I was looking for another P220 and this one was in great shape (sweet trigger!) for an excellent price I bought it and took it home. Lo and behold when I check the internet for "SIG SAUER PROOF MARKS" I discovered that this is an actual German manufactured P220 that was proofed in 1986. Life was good today. Think I'll celebrate Memorial Day at the range.