Lexington battlecruiser to aircraft carrier conversion models illustrating the genesis of the Lexington-class aircraft carrier design. In the foreground is a model of an aircraft carrier design converted from the battlecruiser hull. 1922.

Source

RenneeMarie: My father in law served on the Lexington. He reported for duty August 1941.

[Source](https://en.wikipedia.org/wiki/File:Lexington_battlecruiser_conversion_models.jpg)

>Rear Admiral David W. Taylor, USN (left), Chief of the Bureau of Construction and Repair, and Rear Admiral John K. Robison, USN (right), Chief of the Bureau of Engineering, hold a model of the battle cruisers (CC-1 class) then under construction, 8 March 1922.

Battlecruiser [final design layout](https://i.imgur.com/LqxuYRt.png).
Interestingly enough, Paul Allen and his team found Lady Lex’s wreck in the Coral Sea just recently!