Interior of a plane showing communications equipment, undated. Written across the image reads: "Rotating loop column with aximuth" "Scale for radio compass bearing" "Radio compass AC Type E-4A with receiver type I99" "Radio compass AC Type E-4 with receiver type 192" "compass indicator" "2 Tuning controls" and "calibration chart - radio compass."

Interior of a plane showing equipment, undated. Inscription on image reads: "Cabin fuel tank. Selector valves and plumbing."

Interior of a plane showing fuel outlet equipment, undated. Inscriptions on image read "fuel outlet" and "dump valve and control."

Interior of plane showing fuel tanks, undated. Inscriptions on image read: "oil 75 gals" "upper right fuel 180 gals" "lower left fuel 180 gals" and "lower right fuel 180 gals." Other inscriptions at the bottom of the image are difficult to read due to darkness of photo.

Interior of a plane showing fuel tanks and valves, undated. Inscriptions on image read: "optical flats for sextant observations" "air pressure engine pump oil feed outboard" "control valve" and "emergency hand pump."

Interior of a plane showing navigation equipment, undated. Inscriptions on image read: "drift sight (Goerz) ground speed meter unit power" and "aperiodic compass AC type D-4."

Aircraft next to airplane hanger, undated. Taken sometime between 1930-1950.