Many years ago (early 1970s), at an OGCA show I saw a Colt 1911 .38 Super pistol which had been the property of Transcontinental & Western Air (TWA), the predecessor of Trans World Airways. It had something like "Property of TWA" engraved on it somewhere, but I don't remember whether it was on the slide or frame. It even had some authentication documents. I would have loved to buy it but the price was well beyond my means at the time. Strange that I still remember it.
That was around the time I almost bought Ian Fleming's authenticated Ruger .22. But I didn't buy it either. There used to be lots of good stuff like that at the OGCA shows.