Edgar Allen & Co. Chicago, ILL.
Bethlehem Steel Co., South Bethlehem, Pa.
Carnegie Steel Co., Pittsburgh, Pa.
Colonial Steel Co., Pittsburgh, Pa.
Crucible Steel Co. of America, Pittsburgh, Pa
Farist Steel Co., Bridgeport, Ct
Wm. Jessop & Sons, Inc, 91 John St. New York
C. Pardee Works, Perth Amboy, NJ
Thomas Prosser & Son, 26 Platt St. NY
Vanadium Alloys Steel Co., Latrobe, Pa
West Leechburg Steel Co., Pittsburgh, Pa

Ran across the above being listed as gun-barrel sources in 1911.

Kind Regards,

Raimey
rse