Lots of mention of choke here, but only Cylinder, Modified and Full
Sport with Gun and Rod in American Woods and Waters by Alfred Marshall Mayer in
1883http://books.google.com/books?id=IJcCAAAAYAAJ&q=choke#v=snippet&q=choke&f=false Found this reference to Full and Modified choke in the
1884 edition of
The American Sportsman: Containing Hints to Sportsman, Notes on Shooting on p. 465
http://books.google.com/books?id=TYFCAAAAIAAJ&q=choke#v=snippet&q=choke&f=false Again, only Full, Modified, and Cylinder in
1895 The Art of Wing Shooting: A Practical Treatise on the Use of the Shotgun by William Bruce Leffingwell
http://books.google.com/books?id=e34EmE3...p;q&f=false Doubles listed in the
1908 Sears catalog, including Aubrey, Baker, Remington, Smith and Ithaca, reference only “Choke Bore.”
"Improved Cylinder"
IS used on p. 465 in
American Game-bird Shooting by George Bird Grinnell in
1910http://books.google.com/books?id=bZcyAAAAMAAJ&q=choke#v=snippet&q=choke&f=false So who, presumably in the U.S. (as in England the constriction of .010 would be "Quarter Choke"), named "Improved Cylinder", and when??