Aero Ab.11 (mock-up) L-BUCD.
The Aero A.11 was a light bomber and reconnaissance aircraft first flown in 1924. The Aero company logo was based on the Czechoslovak roundel and this mock-up appears to be painted as a factory-owned aircraft carrying a civil pre-1928 L-B registration. Apparently L-BUCD was c/n 17. | Phil Glover