Yes, my youngest son finagled a ticket to see the match. Ah, I can watch a few minutes of it before I am reminded on the vulgar NIL factor and just like Saban vividly said from the podium, you can't get the good guys without bribing them.... >>What's in it for me Generation<< But I digress.

I would say follow the wares of Léopold Bernard of Paris. It was this exact decade/time period(1865) that he took the Eastern Railroad to task and draggin' them it Court for transporting E. Bernard(of Liège) tubes(psuedo/fake where he would stamp any tube for 2.5 Frs.).

And I am kindly reminded again that Powell was using >>Punched Steel<< for their scattergun tubes commencing in 1866. So, with all this occurring @ the same time we should closely examine the scattergun tube steel in the 1860s.

Pattern welded tubes w/ rifling are most difficult to trace. I have never seen a price list and maybe not even a blank as all that were touted were the ones for scatterguns. Maybe it was the mechanics that convinced the end user(Hunter) that they really wanted Damascus so that they import cheaper pattern welded blanks from Liège instead of embracing the more expensive new fangled fluid steel?

Serbus,

Raimey
rse