Model. M65 280 m.m. Weight. 42,500 lbs. Length. 42 feet (1) One of only (3) three in existence, the other two are located at Ft. Sill, Oklahoma and the U.S. Army Ordinance Center in Aberdeen, Maryland. It was placed in service November 17, 1952 . . . — — Map (db m60887) HM
Military reservation of 55000 acres of land and water. The Ordinance Department, U. S. Army operates here; the Army Proving Ground for Arms, Ammunition and Automotive Equipment; the Ballistic Research Laboratory; the Ordinance School. Established . . . — — Map (db m1260) HM
At 8:31 a.m. on 25 May 1953 this gun fired the world's first atomic artillery round, at Camp Desert Rock, Nevada. 19 seconds later and 7¾ miles distant, the shell that could wipe out an enemy division exploded on target with . . . — — Map (db m60886) HM
240mm T1 Gun, Watervleit Arsenal, New York, c. 1950, serial number 1.
280mm T72 Gun Carriage, Watertown Arsenal, Massachusetts, c. 1952. WM 87.31.7 a,b
The 240mm gun provided a bridge between conventional cannons and atomic cannons. In . . . — — Map (db m34004) HM