short tons (2.472 t). Gun No. 365, the first Mark 9, was ordered from MidvaleSteel on 18 October 1911. There were 390 Mark 9s built by four different manufacturers
reorganized and renamed the Cambria Steel Company in 1898, purchased by MidvaleSteel and Ordnance Company in 1916, and sold to the Bethlehem Steel Company
Steel Company, the successor of the Cambria Iron Company, built by the MidvaleSteel and Ordnance Company in 1917 and acquired by Bethlehem Steel in 1923
with Edward Clark, part owner of MidvaleSteel. (Edward Clark's son Clarence Clark, who was also a manager at MidvaleSteel, married Taylor's sister.) Early
Campaign. Versions of the Mk 6 were manufactured in the United States by MidvaleSteel and Ordnance Co, Nicetown, Pennsylvania during World War I, initially