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.
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