This is a very early DC-3, built in 1939 and thus 80 years old when this photo was taken! It was once the world's only C-41A, flying with the USAAF with serial 40-70. It was withdrawn from use in late 1945 and placed in storage, before being rebuilt as a regular DC-3 by Standard Airlines in December 1951, using parts from various airframes. This was the start of its long civil career.
Built in May 1940 as a DST (Douglas Sleeper Transport) NC25685 for American Airlines, fitted with right hand pax door. Served USAAF 1942/44 as C-49E 42-56104. Returned to AA. Modified as DC-3A with left-hand door. Served PBA from 03.70 until 1991, latterly on schedules from Miami to Naples and Key West. Stored in 2010.
Ordered as a DC-3-455 for Eastern but delivered to the USAAF as C-49K 43-2013 in January 1943. Disposed in 1945. Converted to DC-3A and served with Delta as NC15748, later N15748. After a crash in private ownership in 1979 this aircraft was eventually donated to the Museum of Flight in poor condition in Aug 1987. Cosmetically restored and placed on display as "NC91008" (c/n 25422) of Alaska Airlines, but removed from display in 1997 and dumped. Trucked to Aerometal at Aurora, OR in June 2016. Note: this airframe is often incorrectly associated with NC17885, but that was c/n 9064.