t4halo
Lee's point is well taken. First, this gun is nickel plated. That alone makes it less common.
As for the 6 1/2" barrel, it was a cataloged item, which is why I would be cautious about saying it is rare. On the other hand, I've never owned a .357 Magnum/Model 27 with that barrel length and have only seen a few in 50 years. Mine have been either 6" or 5", and I sold the last 6" example some years back.
So, perhaps "uncommon" would be the best way to describe the configuration of your revolver. In any case, I like it! I particularly like the fact that it shipped in the gold box, with no indication on the box that it is a Model 27. I own quite a few revolvers that have their original gold boxes, but none that shipped as late as yours did. I know they exist and I like seeing them show up. One of these days, maybe I'll acquire one.
Lee's point about the shorter lifespan of a
model marked 27 with four screws is also an important note.