In brief:Juha Tompuri wrote: Do you know is there any relevant "new" info there about the two cases?
1.12.1939 Soviet squadron flew to Viipuri. It was third mission on this day. Soviet fighters met only VL Tuisku over the city and destroyed it. At this moment Pokryshev had a hit from AA fire. He landed at the swamp between Soviet and Finish trenches and returned to Soviet side in the night.
On 18.12.1939 it was an interception fligt. After midday Soviet fighters got an information about finnish attacks of soviet bombers. They did not found finnish planes and attacked trains at the railway station N-E to Viipuri. Suddenly 3 Fokkers attacked soviet fighters. Pokryshev destroyed finnish leader but two finnish wingmen slinged from his hook. In a moment Pokryshev had a hit from AA fire and force landed in the forest near unknown lake.
Regarding soviet stuffs: to understand the Soviet version of history it is necessary to live in the Soviet Union . This is also applies to Russia. One Russian poet from XIX century said: "the mind can not understand Russia...one can only believe in Russia". Seriously: all stuffs were wondered why finns fight against Soviets and do not fight against Mannerheim's junta.
By the way, it would be nice to check records from ITR 2 war diaries dated 12.1939...