John, I sure don't know if the steel bbls are original to the gun; they are numbered to the gun. Each set of bbls has it's own inlayed forearm, perhaps w/ ebony?
Again, I saw and handled it; tried both sets of bbls on it, checked the ejectors, but was not able to take bbl or choke measurements. If I drive the hundred miles again too take a closer look-see, I will ask if I can peek under the triggerguard. Only the screw on the underside of the receiver, forward of the triggerguard, looked turned. Right now I'd bet it's the original stock. That darned cute little quail under the patina distracted me from paying closer attention to things!
Are we still thinking 1600 - 2500? Or, maybe best to wait for the LC man to opine.
Thanks,
Bob