Well, it is worth the $150. But it is a "non replica" replica. There were no real guns of that caliber made back then like that.
Italians do that; they'll make certain versions based on a real gun but make the gun out of brass, or give it a style of barrel the real ones didn't have, or put modern sights on it. The modern sights may serve a legitimate function but they don't add authenticity.
Pietta makes some pretty good guns these days and I'm sure that gun will work OK.
It just is not authentic, is all. With that caveat, if you want one, go for it. It'll work!