Guill,
When mine was done, they replaced the crane & barrel and reblued the gun.
There was something noted on the bill about the barrel that my hazy memory can't recall, but seems to think it involved something outside the norm.
Was done just for my gun, something like that.
Too long ago.
The one you show could very easily be a factory re-do, not a mis-marking, and it doesn't have to be a Bubbajob.
It's hard to say "never" with S&W, and what I can see of the barrel markings in the photos appears to match the style on mine.
The lettering also appears fractionally smaller on my later 25-9 than on my 25-5.
Denis