This is the royal class edition from Eduard of the Avia B.534 biplane.  This aircraft was used by many nations as a fighter and later a training aircraft during world War 2.  The Czech and Slovak air forces, the Germans, the Italians, the Spanish and others used the aircraft. This version comes with Painting masks, photo etched and resin parts.  You can make four of the 30 versions enclosed in this 1/72 scale kit. It has extensive decals for each version.  The model comes with a book on the aircraft with extensive pictures.  It is in the Czech language so unless you read and understand that language the value resides in the pictures. Number 10 (R0010) in the series this is a must have for the serious collector.