I'm not sure what the kill marks represent because they don't exactly correspond to the standard pre-1943 tactical markings other than the airplane. Downing 2 airplanes with an MG34 is amazing - they may represent aircraft destroyed on the ground. The 2nd symbol is for sure a fully tracked vehicle but I don't know what - I'm guessing some kind of artillery tractor - but something that could be destroyed by an MG34. The 3rd symbol is for a wheeled vehicle - a car? Maybe a truck. The 4th symbol is one I have never seen. It doesn't look like artillery symbols the Germans used. - maybe a motorcycle? Maybe it was an artillery piece that went with the tractor. You would probably have to ask a member of the unit exactly what they stood for.
The tactical symbol of the model itself is clearly a halftrack. The box shape represents infantry - looks like first company. The pennant is pre-1943 for Panzer. Put it all together for 1st company of armoured or mechanized infantry.
The yellow ribbon symbol is for the 14th Panzer Division which was formed in August 1940 after the Battles of Poland and of France. It saw action in the April 1941 invasion of Yugoslavia and returned in time for Barbarossa in June 1941 as part of Army Group South. The 14th fought at Kiev, Rostov and the Chernigovka Pocket. It was transferred November 1942 to the ill fated 6th Army just in time to be destroyed at Stalingrad January 1943.
Terry