"Stub Damascus" is probably a historically dated term anyway. It was used by Henry Wilkinson in
Engines Of War: or, Historical and Experimental Observations on Ancient And Modern Warlike Machines And Implements, Including the Manufacture of Guns, Gunpowder, and Swords with remarks on Bronze, Iron, Steel, &c. published in 1841.
http://books.google.com/books?id=0XJeF_o...w3u60I#PPA70,M1but by no one else (other than both W. and W.W. Greener) writing after about 1850 (unless they were 'borrowing' directly from W.)
http://docs.google.com/Doc?id=dfg2hmx7_69dxb227c6W.W. seemed to use the term for
any British damascus barrel, using the terms One, Two, and Three Iron, and
Best "Stub Damascus" as late as 1907
http://docs.google.com/Doc?id=dfg2hmx7_234chsrtv6sBUT no "Stub Damascus" barrel was listed as having been tested in the Birmingham Proof House Trial of 1891
W. Greener also mentioned the increasing difficulty in obtaining high quality 'stubs', and by the mid 1800s, the Best Gun makers (including Purdey) seemed to be using 2 and 3 Iron Damascus rather than Stub Twist.