The first flight of Ju 52/3m took place on March 7, 1932, so it did not exist to be used for the spy flight over Lipetsk shown in this episode.
While the pilot is initially trying to take-off in the Ju-52, the video shows the label "GPS Limited to VFR" in the center console, and directly below it are two GPS warning lights. The first GPS satellite was launched into space in 1978.