Unspecified / 1920
Sperry gyro-compass
Sperry gyro-compass
The Smithsonian catalogs Sperry gyro-compass as books in its Gyro compass records.
WHY IT’S INTERESTING
Trade literature.
A CLOSER LOOK
The Smithsonian lists the object under Gyro compass and dates it 1920.
Trade literature.
FOLLOW THE EVIDENCE
Smithsonian InstitutionSperry gyro-compassOriginal explanation based on the sources above. Images carry their own reuse terms.