The OP's gun has a very interesting front sight. A pinned Patridge on a big black base. Different. It's also a standard production gun, not a Performance Center. The flash chrome hammer and trigger are indicative of a -3 or earlier, making it a fairly older piece. It's possible it a one-off European export gun. I'll do some more research and see what I can turn up. One thing for sure, it's not a typical 8 3/8-inch gun.
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~ S&W aficionado in training ~
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