"Original"? The body is the only "original" part on there.
A circa-3K serial number puts the thing somewhere around, what, '91 or so? Not a bad start, sure, but damn near everything else on there dates to an easy eight to ten years later.
Is this one of those "Grandpa's Axe" kind of situations? "Yeah, we replaced the head twice and the handle three times, but it's still grandaddy's axe!"
"Yeah, I replaced the barrel. And the bolt. And the back block. Oh, and the beavertail, the grip frame and the front block bolt. And I replaced the pneumatics with those from a later model gun. And I put a new valve in it. But it's still completely original!