I didn't read this entire thread, so I don't know if my comment will be related. Shenandoah Guns in Berryville, VA had a GH 16 gauge with 40" barrels several decades ago. I don't know what happened to that gun, but I handled it. It didn't seem to be on a large frame, but the barrels were Vulcan Steel as I recall, not Damascus or Parker Special Steel. I don't know whether TPS mentions this gun.

If my assumption is correct my dad and Jerry Amos went to Clark Bros to look at a Parker 16 40” once upon a time . Dads been retired for 32 years so it was before then . And if it’s the one John Clark had it went to Herschel Chadick .

I believe Gary C. owned it for a number of years but I thought it had Damascus barrels...





.

It most certainly was a fluid steel gun. The barrels were not Parker Special Steel which was proper for a G grade. However, it was not so unusual for such a rare gun to be factory barreled or rebarreled with a different type of steel.