
Been thinking about this all day, so I did a quick amateur colorization and editing. I couldn't identify where it would have been camouflaged with the tan so I left it olive drab.
The C-79, serial number 42-52883, unique example of Junkers Ju 52/3m employed by the U.S. Army Air Force in this photo, late 1942, at Howard Field, Panama Canal Zone, in service with the 20th Transportation Squadron, Sixth Air Force. The aircraft was originally the Lufthansa’s Ju 52/3mge (c/n J5283) D-AENF transferred on 1 April 1937, it was transferred to Lufthansa Südamerika for Andes service and named "Aconcagua". It was again transferred to the Brazilian airline Sindicato Condor as PP-CBA on 11 September 1939 and then to Lufthansa Sucursal Peru as OA-HHD on 29 November 1940. Syndicato Condor then leased it to Sociedad Ecuatoriana de Transportes Aereos (SEDTA) on 25 April 1941, where it was registered as HC-SAD. On 5 September 1941 was confiscated by Peruvian government and later, on 13 May 1942, was acquired by the USAAF as war prize and designated C-79. In the USAAF service the aircraft was refitted with Pratt & Whitney R-1690 engines with modified cowlings and 3-bladed propellers. Other modifications was the replacement of the air-brakes with hydraulic brakes, replacement of original tail skid with a tail wheel and U.S. instruments and the radio in place of the original equipment. In December 1943, it was turned over to the U.S. Public Roads Administration in Costa Rica in as TI-60. The C-79 was phased out one year later.
Source:
https://www.ww2incolor.com/gallery/us-army-air-force/37507/an-american-%22tante-ju%22Some other sources I found.
https://www.aerofly.com/community/forum/index.php?thread/13041-ever-heard-of-a-c-79-aircraft/https://www.facebook.com/Junkers.Ju52.3m/photos/a.187302304764825/187304231431299/?type=3https://en.m.wikipedia.org/wiki/File:German_Junkers_Ju_52_in_USAAF_service_1942.jpghttps://ww2aircraft.net/forum/threads/unusual-aircraft-in-usaac-service-pt-1.24195/