The cylinder looks exactly like a .38 M&P. The only difference between the early K32 and the M&P target is the caliber. Every thing else is identical. And hold on to your seat...There was one pretty similar at the OGCA show over the weekend. OK, not exact, it didn't have the hammer and it had service grips. But still nearly a dead ringer.
My guess is S&W only made one like Dave's K32, but we're not sure. Heck, we're not even sure the hammer is original to the gun (it doesn't letter as I recall.) I'd bet there were maybe dozens of the M&P Target guns with HBH produced. I have nothing to prove it. I have one in the gun room, except it doesn't have the Magna grips (but does have the harder to find HBH.)
OK, enough speculating. Dave's gun is spectacular to look at. It has balance and beauty. I'm sure he gets great satisfaction from owning it, even more having it grace our pages every time we open the forum.
Now you guys start to see why us old guys love the prewar guns so much. For a long time the romance was mostly with N frames, the glamor girls in the line. Now suddenly the wallflowers are beginning to surface.
For instance, the K22 Outdoorsman is pretty near a dead ringer for the above gun. The only difference one can tell from the side would be the pin to retain the firing pin above the upper sideplate screw. Other than that and the bore, all dimensions are identical. I've got a couple of K22 Outdoorsman with the HBH. Bruce has one or two with Magna grips. The guns aren't rare.. Just highly sought after and when we buy one, we lock it away from sight until we die and our heirs can sell it.
The guns are beautiful. Buy one if you see it.