Not so typical GHE?

[Dean Romig]

Wasn't John Dunkle's Great-Grandfather's fabulous trap gun the very first vent rib gun made by Parker Bros.?

[C.O.B.]

I believe TPS lists the serial number of the AH gun that had the rib. I didn't write it down however.

[Autumn Daze]

Dean, I believe it is.

[Tom Pollock]

Added a few pics of my original high condition ventilated rib Parker. If you look close you can see the pins. I believe this is common on all ventilated rib Parkers.

[edgarspencer]

Jared's Damascus barreled vent rib gun may have been hand engraved, either in the worded area and posts, or entirely (though I doubt that) but Tom's gun looks too uniform to have been hand engraved. Thinking like an engineer (or, more to the point, a retired engineer) It would seem very logical to me to drill the rib, silver solder the posts in, and then roll stamp it, before attaching it to the barrel.
Simmons ribs, either supplied attached by Winchester, or sold separately, were fully finished prior to attaching to the barrels. I have a new Simmons rib for a Model 42, unattached, but with posts. The pressure of the roll die is so great, it surely would have deformed the barrel, had it been rolled after attaching.