VERY interesting thread going http://www.parkergun.org/forums/view_topic.php?id=6595&forum_id=1

Does anyone know how damascus RIBS were made? cut barrel material? the same lopin hammer welded, twisted, rolled, and squared, but only one rod? It looks to me like the rib damascus for the most part is different than the barrel pattern.

And Dave Noreen's C grade 1894 with "Etoile 3 B.P." has a non-twisted segment for the rib extension