Sikorsky XPBS Images

Taking off from San Diego harbor, California, bound for Pearl Harbor, Hawaii, on 5 April 1940.

In flight on 15 November 1937.

Taking off from San Diego harbor, California, en route to Honolulu, Hawaii, on 5 April 1940.

Mechanic's compartment circa 1937. Note fuel line gauges and controls, other instruments, electrical equipment, and intercom headphones.

Aircraft's galley facilities circa 1937. Note details of electrical wiring and switches.