I had my gun MIA in a shooting lodge for a whole day, because some guy didn't notice it wasn't his gun...
It was a Beretta SPIII with a blank oval, and I'll get it engraved as soon as possible.
I think all guns and cases that are mixed with others in a lodge or someplace else should have some kind of ID.
The practical point of having the oval engraved was not having the Earls Purdey's ending up in the wrong place, and although not a Purdey I missed not having my gun for the day.

Best
HM