I would advise trying to find a later Model 14 with the lugged barrel.
There are only minor differences between a Model 14 and 15. Generally speaking:
-4" tapered barrel and ramped front sight: Model 15
-6" heavy or lugged barrel and Patridge front sight: Model 14
-Rare exceptions include 4" Model 14s with heavy barrels and 6" heavy barrel Model 15s