Here`s a little update on the New Orleans class
USS Astoria, USS Minneapolis and USS San Francisco:
USS New Orleans, USS Tuscaloosa, USS Quincy and USS Vincennes:
Note the removal of the lower deck on the bridge, which has been replaced by a simple platform with 4 20mm AA guns. Additional 2 20mm AA guns on aft platform.
USS New Orleans, USS Minneapolis, USS Tuscaloosa, USS San Francisco refits:
Note the different superstructure, the removal of one crane and one catapult, additional AA guns and repositioned radars.