I suspect you are right! Although, it could be a 25-5 that was mismarked. I suppose. I remember when Smith did not make a .45 Colt, and when they brought one out it was only in four inch, as a normal production gun. Later, they added the longer barrels. They didn't make a four inch 25-2 back then, either. But, I have to wonder why someone would convert a 25-2 into a 25-5 configuration? Interesting.

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Richard Gillespie
FBINA 102