I have attached that photo from 1924. The sign in the photo reads:
"Bottom for largest elevated tank in the world
Diameter 54 feet
Height 128 feet
Capy. 1200000 gals
San Diego, Calif."
Some additional info: Contractor was the Pittsburgh-Des Moines Steel Company, Tank is supported 50 feet above ground, Height of tank is 52 feet, Height from foundation to the overflow cap is 127.5 feet, When fully loaded the tank held approximately 5000 tons of water, Steel structural plates weighed 400 tons
Source: North Park: A San Diego Urban Village 1896-1946, Donald P. Covington, Hon Consulting Inc. 2007
I have also attached a photo of how it stands today, one of it in the context of the neighborhood and one of me dressed in my water tower costume in last year's Christmas parade.
Thanks again for creating such a wonderful collection! V.