prattwhitneyr1340waspc

Here is a link to British Pathe footage of Charles Lindbergh flying this very aircraft (TWA, Lockheed DL-1 Vega, NC497H, c/n 135): YouTube: British Pathé - "Lindbergh Test Flight For Night Mail Aka Lindburgh Test Flight For Night Mail (1933)"

The DL-1 was a modernized version of the Lockheed Vega 5C and was developed by Detroit Aircraft. Three Detroit-Lockheed Model Ones (DL-1s) were assembled in Detroit, Michigan, with a duralumin fuselage made in the Michigan city and wooden wings made by Lockheed in Burbank. This aircraft, the first of the DL-1s, was completed in February 1930 and in June 1930, American aviatrix Amelia Earhart borrowed the aircraft and set three woman's speed and load records at Grosse Isle Airport, Detroit. 1000aircraftphotos.com/Contributions/LoopPat/4206.htm

The person standing on the left side of the frame with hat in hand is aviator and Lockheed Corporation vice president, Carl B. Squier (1893-1967). See: en.wikipedia.org/wiki/Carl_B._Squier

Aviator Art Goebel to the left side of the frame, his mother Emma Goebel, and famed Air Corps pilot Ira "Bert" Woodring on the right.

This is Lockheed Explorer c/n148, NR101W, 'Yankee Doodle', built for Goebel but never flown by him. Later sold to Pure Oil Company renamed 'Blue Flash' and flown by pilot Roy Ammel. Plane crashed on take off from France Field, Canal Zone on November 21, 1930.