Hey folks, I'm new to this site. Was wondering if I could tap into some of your expertise as the gentleman at glock said this is the place to go. I recently bought out a gun collection from a friend's dad who developed Alzheimer's. In the collection I came out with an early G17 serial prefix AH and Austrian proof marks. I was able to determine that the pistol was one of the 2nd thousand imported into the country but i wasn't sure if it had the original "pencil" bbl and weather or not it had the "safety" update in the ninety's. Any advice on determining this? Wanna kill these ads? We can help!