I don't know that it makes any difference, but it's easy to swap out Python front sights. If you happen to look at it again notice if the sight is pinned to the rib with one or two pins. The number of pins denotes the size of the thread on the barrel, and might relate to the future availability of whichever barrel.
A S&W model 13 does have some possibilities...
Colt used the "Agent" name on several revolvers - some better then others. If it has the heavy-lugged barrel check out the finish and stocks. A polished blue and short checkered walnut stocks is best. A flat-parkerized like finish with plain wood or rubber grips is less desireable. Both are good, but the first style is indicative of more and better internal hand fitting.
A S&W model 13 does have some possibilities...
Colt used the "Agent" name on several revolvers - some better then others. If it has the heavy-lugged barrel check out the finish and stocks. A polished blue and short checkered walnut stocks is best. A flat-parkerized like finish with plain wood or rubber grips is less desireable. Both are good, but the first style is indicative of more and better internal hand fitting.
