Hand fitted with all steel components that fit and generally never wear out. The weight, heft and feel are more like a Centerfire lever. And they're damn accurate. Of the half dozen I've bought and sold, the sales price was considerably more than what I paid. The four I currently own will only be sold when I'm physically unable to shoot them.
The newer ones are not as well made, and since the introduction of the rebounding hammer, just don't shoot as well, so out the door they went. If you own one or have opportunity to purchase an older one, you will soon know what the rest of the 39 crowd knows.