Repaint for the payware Avro 504 K by Aircraft Factory/A2A.
The scheme represents U-1, a Soviet copy of Avro 504K carrying paints of Osoavyakhim (Soviet paramilitary organisation) and nicknamed 'The Delegate', 1929.
Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.