I see a favorite of ei8ht's and mine made it into the article...
True West / The Culture
April 22, 2014 by Phil Spangenberger
In the early 20th-century West, when semi-automatic pistols were gaining favor, their slab sides made them ideal for concealed carry, as evidenced by this “inside the trousers” holster with its .32 ACP 1903 Hammerless Colt Pocket Auto. The holster’s backing is inked in old script with “M.S. Hines, Cedar Rapids, Iowa.”