Some time ago there was a discussion of an H&H in this caliber with unusual proof marks. So I just got in a very interesting Jones underlever hammer gun by Thomas Turner. For one thing, the entire outer surface of the barrels is machine matted! Even the sides of the rib are matted. Then, according to the SN it was made in 1925, however the proofs are very early BP proofs showing a bore number 56 and no dram markings at all. Just a crown over BP in script. The action also has the tower icon that W&C Scott use on their early guns so they probably made the action. Looking down the barrels, they have rather shallow rifling which is pristine, of very slow twist maybe 1:60 or so. None of the usual BP frosting or worse, pitting. It was used for the intended purpose because it was a tad loose when I got it and had to be rejointed. So the bores are not pristine due to lack of use. The chamber is for a 3 1/4" necked ctg, rim circa 680, base circa 580. The bore slugs around .458 with 7 grooves. So I am pretty sure this is the 500/450 "Magnum" 3 1/4" ctg. But 1925? Cannot be with those proof marks. And it's been shot with the NFB load not black, or the bores would be frosted. Oh, it weighs 10lb. Will be posting pics when I get them done.