Chris Cavas on X: "More fm #LEXINGTON CV2. 1.1-inch four-barrelled anti-aircraft gun, a "Chicago Piano." B&W shot is 24 Feb. 1942 aboard USS ENTERPRISE CV6 during a raid on Wake Island. https://t.co/flUfX5l2wC" /
Quadruple 28mm AA Chicago Piano | Azur Lane Wiki | Fandom
A "Chicago piano" of 8 two pounder pom pom guns aboard HMS Rodney : r/WarshipPorn