FWIW, I bought a handful of Smith's from a local guy that used to live and work near the plant in MAss,

he had a few revolvers (I bought most of them) that were errors or oops,
as in a Mod 29 marked frame with a Mod 24 barrel and cylinder

I don't recall what the other 2 were, but they are by no means rare,, and somewhat collectible,


found another in an estate out of TN a year or so later,


I have a Mod 27 in the shop now with what appears to be a 27 barrel, only marked 38 Special,
and a 38 Cyl,