Lufthansa was launching-customer for the Boeing 737 in 1968. More than three decades later, the 737 is still an important aircraft for the german flag-carrier. This Boeing 737-530 "Bad Nauheim" was delivered to Lufthansa in June 1991. On the image above, you can clearly see the oval-shaped engine inlets - a distinct feature of Boeing 737 classic (300/400/500) aircraft.