From the plaque:
site on July 14, 1937, three Soviet aviators completed
a transpolar flight from Moscow in 62 hours, 17 minutes,
establishing a new world's nonstop distance record of
6,305 miles. The huge single-engine aircraft, an Ant-25
Military Reconnaissance Monoplane, was shipped back to Russia and placed in a museum. Aircraft commander
Mikhail Gromov, co-pilot Andrei Yumashev and navigator
Sergei Danilin became generals in World War II.
Placed by the San Jacinto Valley Transpolar Flight Committee, City of San Jacinto, Billy Holcomb Chapter o, E.C.V., and Museum Associations of San Jacinto and Hemet.