This aircraft was developed from the BH-11 for the Challenge Internationale de Tourism race in 1929 by slimming down the fuselage, modifying the rudder, aerodynamically refining the entire structure, using a split landing gear and removing the pylon behind the cockpit. The aircraft's performance did not meet expectations so did not fly in the race. The plane was later transferred to the MLL Nymburk branch where it flew from 1933 to 1938 as OK-LIQ. In 1967, it was donated to the National Technical Museum in Prague, and from there it entered the collection of the museum in 1968.

The BH-11 prototype first took off on June 17, 1924. The primary customer was the Czechoslovak Air Force, which used the type under the designation B-11, Bš-11 (trainer) and Bk-11 (courier). The BH-11C was the sports version and L-BONK won the air races in the mid-1920s, firstly in Paris and then the Coppa d'Italia, the prestigious race around Rome. It then flew for the Aeroklub Pilsen (as OK-IZZ?) and was stored in the repository of the Museum of West Bohemia, where its condition slowly deteriorated over time. A restoration was completed in 1968 and the plane is now (almost) on display.