I guess it would look someething like the following:

http://www.google.com/patents/US1316509
U.S. of A. Patent 1316509

http://britishmilitariaforums.yuku.com/topic/12624/Belgian-Snider-Carbine#.U5Op2fmwKTk

"ROSE'S were Rose Brothers Gun and Pistol Barrel Makers of 13 Newton Street, Birmingham and Hales Owen Mills and Forge (1860-70) Miss R. Rose, agent, 13 Newton Street (1864-70)

Aaron Rose had been granted British Patent 13,299 of 24th October 1850 for making twisted iron barrels. I had a Volunteer Enfield with one of their barrels which had a beautifully browned barrel bringing out the extra fine twist pattern very clearly.

To quote their advertisement of 1868 –
“ROSE BROTHERS (by her Majesty’s Royal Letters Patent) Hales Owen Mills and Forge, near Birmingham, Manufacturers of Chassepot Rifles and Every Description of Military Gun Barrels, from either steel or iron, Manufacturers of Drilled Cast Steel Moulds, for rolling Chassepot Rifle Barrels, or any other description of Military Barrels. Also, Manufacturers of every description of Sporting Gun Barrels, Either Breech-Loaders, or Muzzle-Loaders, made from Steel or any description of Fancy Twist Iron. Contracts made with Foreign Governments for Chassepot Rifle Barrels, either in the unfinished or finished state, likewise for Cast Steel Drilled Moulds. N.B. Retail Warehouse 25, Newton Street, Birmingham.”"

http://books.google.com/books?id=NJZQAQA...rel&f=false
Mentions a Joseph Barnsley


Kind Regards,

Raimey
rse