The M1911 is not an automatic pistol. Additionally from your own link in the text following told ad, While searching through back issues, AmericanRifleman.org found the very first advertisement for a 1911 pistol to ever run in an NRA publication. Even then, the 1911 held a fascination as one of the first reliable semi-auto handguns to be offered to the public. . From colts own web site
Colt pistols have long represented the gold standard in magazine-fed semi-automatic handguns.
Modern semi-automatic pistols all trace their roots to the famed Colt M1911 pistol, designed by John Browning and the standard-issue U.S. military sidearm from 1911 to 1985. Colt 1911 pistols and their descendants were in the hands of confident World War I, World War II, Korean War and Vietnam-era servicemen. Colt customers today can purchase reproductions of these weapons, each faithfully manufactured to the original specifications from factory blueprints.
Notice that advertisement has “Colt Automatic Pistol” plastered all over it in bold letter. It’s always been known as the Colt Automatic pistol.