The 2 3/4 inch 12-gauge Super-X, Nitro Express, etc. boxes were marked as 3 3/4 drams equiv. 1 1/4 ounce of shot. Prior to the introduction of the Super-X loaded with progressive burning powders such as DuPont Oval or DuPont 93, the heaviest loads with bulk or dense smokeless powders the manufacturers regularly offered was 3 1/2 drams equiv. and 1 1/4 ounces of shot. However, it seems from my reading of the sporting press of the day, the 3 1/4 - 1 1/4 was considered a more "balanced" load.
Barrel names like Sterlingworth Fluid Compressed Steel, Chromox Fluid Compressed Steel, Nitro, Pigeon Nitro, Crown, Homo-Tensile, Flui-Tempered, Trojan, Vulcan, Parker, Parker Special, Titanic, Acme, Peerless, etc. were pretty much fanciful names made up by the shotgun manufacturers. I've examined Fox barrels marked Chromox on top with four different tube suppliers marks on the bottom -- LLH, SB&Co., a D with a three-lobed crown over it, and a couple from the early 1920s with vestiges of the Fluid Steel Krupp Essen marking!
