At the end of the war, Czechoslovakia needed airplanes and they were already building Bf-109s in the Diana works so it was logical to continue to build them for their own country. These were built with DB-605 engines. They would continue to build them until a fire at the engine storage facility and factory. Then they decided to switch to the Jumo engine and created the Avia S-199. What makes a Diana G-10 is a unique aerodynamic fairing, as well as, the shorter landing gear and the bigger balloon tires with the associated large bulge on the wings.
The Eduard Limited Edition boxing of the Avia S-99/C-10 is actually a Bf-109G-10 by another name. This boxing comes in a sturdy cardboard box with a colorful S-99 on the box top. Inside is what really matters though, and it does not disappoint.