Could the submarine photos have been taken around the Coliseum?
I found this Los Angeles Times "From the Archives" article:
Japanese Sub at UCLA-USC Football Game
A captured Japanese midget submarine was paraded around the Los Angeles Memorial Coliseum during USC-UCLA football game Dec. 12, 1942.
https://www.latimes.com/archives-japanese-sub-at-ucla-usc-football-game-story.html
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Also:
WWII U.S. Captured Equipment 1942, Los Angeles, USA
A two-man Japanese submarine, aka "Tojo Cigar" is displayed for thousands of workers at the California Shipbuilding Corporation during a nationwide war bond sale tour for the U.S. Treasury Department, in Los Angeles, Calif.,. The sub was captured at Pearl Harbor under the personal direction of Captain Eugene Wilson of the Army Air Corps, who was inspector general of the Hawaiian Air Force when the Japanese attacked. (A separate website titled
This Day in History gives the date of this event as December 23, 1942.)
Shutterstock
(Additional photo at the link.)
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FYI: The California Shipbuilding Corporation built 467 Liberty and Victory ships during World War II. California Shipbuilding Corporation was often referred to as Calship. The shipyard was created at Terminal Island in Los Angeles, California, as part of America's massive shipbuilding effort of World War II. Calship was created from scratch and began production of Liberty Ships in May, 1941. The yard was located on 175 acres on the north side of Terminal Island, north of Dock Street, near present-day berths 210-213.
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