Boy did the Herman H. Kiffe Company offer a selection of doubles in 1903:
http://books.google.com/books?id=Bjg9AAAAYAAJ&pg=PA115&dq=royal+steel+barrels&cd=1#v=onepage&q=whitworth%2C%20crown%20and%20sieman's&f=false
Of particular interest is the L.C. Smith advert on page 115: "No. 1X - Royal Steel Barrels, made of carefully selected steel, toughened and hardened. In the point of construction, are similar to Whitworth, Crown and Sieman's Steel Barrels...." I wonder if they are referring to composition and are they implying that the tubes are imported?
Pre - 1893? Herman H. Kiffe Sporting Goods was located at 318 Fulton Street in Brooklyn, New York, then it moved to 473 Broadway and by 1896? it could be found at 523 Broadway, NYC, NY.
Kind Regards,
Raimey
rse