Your spot on locopistion … it is the Junkers Ju-49.
The Junkers Ju-49 was a German aircraft designed to investigate high-altitude flight and the techniques of cabin pressurization. It was the world's second working pressurized aircraft, following the Engineering Division USD-9A which first flew in the United States in 1921. By 1935, it was flying regularly to around 12,500 m (41,000 ft).
The Junkers Ju 49 was developed entirely to investigate techniques for flight at high altitude. To this end, it had a specially developed engine and the first pressurized cabin in a German aircraft. The engine was the Junkers L88a, which combined two six-cylinder inline L8 motors into an upright V-12 and had a two-stage supercharger plus intercooler to sustain power at high altitudes. It produced 522 kW (700 hp) at about 5,800 m (19,000 ft). This engine drove a large four-blade propeller. The pressure cabin held the two crew. The original intention was for operation at about 6,000 m (20,000 ft).
Only one Ju 49 was built, carrying the civil registration D2688 and later (when German civil registrations changed from numbers to letters) D-UBAZ. It ended its life at the German research center (Deutsche Versuchsanstalt fur Luftfahrt) and crashed in October 1937.
Your turn locopistion, well done.