Introduced 1923, the same year as the Smith. One Smith Long Range was produced in 1921 and an Eagle grade Long Range in 1922.
1904-1914 W.J. Jeffrey & Co. catalogs
Parker Bros. 1929 Catalog
"Magnum, Super, and variously named guns about which so much is now being written are not a new development in the gun makers' art. For the past twenty years Parker Brothers have made guns to handle heavy charges of powder and shot, giving good patterns at long range. Recent improvements in powder and by shell manufacturers have served to make the Parker Long Range gun even more effective, so that today the Parker built and bored to secure the full power of modern loads with which one may confidently expect to bring down game at distances a few years ago considered impossible, is up to date but not new. Parker Long Range guns are built to guard the user against abnormal recoil. The weight of the barrels is so distributed that the gun handles the heaviest loads with comfort. The purchaser of a Parker Long Range can rest assured that he will receive a gun, easy to handle, sufficiently heavy and properly bored to shoot the heaviest loads for the killing of wild fowl at extreme ranges."
John Olin may take part of the blame
1923 Western Cartridge Catalog. "The Super-X load actually gives 15 - 20 yards greater shotgun range." Courtesy of David Noreen