I should have realized it wasn't a triple lock based on the barrel shroud - my bad. I am new to the older S&W's and the variations of them. I haven't looked at the gun in person yet - just the photos posted here - as it's a couple of hours away from me.
I am interested in a shooter, so will likely pass on this one if the cylinder is not the correct heat treat for 45 ACP.
Yeah, and the cyl frame lug in the lower right corner of the cyl window isn't replaced and fitted for an ACP cyl so the cyl will have considerable play fore and aft when open.