Raimey,
The source for establishing the 1911 introduction of the Daly SBT was a SD&G catalog, specifically catalog No. 52. Catalog No 52 is a listed as a "Supplement to Catalogues 1910 and 1911 Spring". In it is the Daly SBT is noted (along with the first mention of the Daly "Infallible Single Trigger".) The SBT is not listed in the 1909 SD&G catalog.
That all said, if shooters were winning matches shooting Daly SBTs in 1909, the actual introduction must have preceded their mention in the catalog by a year or two.
Thanks for the information.
Ken
