Nice pair

Not Jovinos with that muzzle.

Mag-Na-Port is a better guess, but Mag-Na-Port usually puts their logo on conversions

There are other gunsmiths that could have done it as well. Cylinder and Slide or Ron Power are viable suspects. With the nice hard chrome job, it could have been Bob Cogan at Accurate Plating and Weaponry, etc.

Give Mag-Na-Port a call with the serial numbers and see what they say

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