I’ve consistently noticed that my “home” in my dreams, though it seems normal during the dream, almost never resembles any place where I’ve resided (nor indeed any place that I recognize).
Now I find that the principle applies not only to dwellings! I had a dream involving “my” pistol, which resembled a Walther PP — a type that I don’t think I’ve ever handled.
Last night I dreamed of a small-caliber gun that externally resembled a Walther but its magazine fed into a revolver cylinder. The cylinder was missing one chamber (if a cavity can be missing); in the dream even this somehow made sense.