12-inch/50-caliber Mark 7 gun

The 12"/50 caliber Mark 7 gun (spoken "twelve-inch-fifty-caliber") was a United States Navy's naval gun that first entered service in 1912. Initially designed for use with the Wyoming-class of dreadnought battleships, the Mark 7 also armed the Argentine Navy's Rivadavia-class battleships.

12-inch/50-caliber Mark 7 gun

The 12"/50 caliber Mark 7 gun (spoken "twelve-inch-fifty-caliber") was a United States Navy's naval gun that first entered service in 1912. Initially designed for use with the Wyoming-class of dreadnought battleships, the Mark 7 also armed the Argentine Navy's Rivadavia-class battleships.