[kolya1]

About captured planes I don't know, but as for the losses during the Khalkin-Gol fighting in the summer of 1939, they were, AFAIK (these figures are most probably approximate only), the following :

- 164 Japanes airplanes (among them 93 Ki-27s and 3 Ki-10s), without breakdown between combat and non combat losses (Soviet claims were 645, including 590 in flight). But I have no detailed source.

- 145 Soviet planes in combat. And 60 more to other causes. (Japanese claims were 1260). Again, no detailed source for material losses, but what can be held for reasonably accurate is that 100 VVS personnel died, 59 went missing, and 102 were wounded.

Most (70%) Japanese losses were suffered in the last month of the conflict, while Soviet ones are apparently more equally distributed between June and September. One can already see that the high overclaiming rates which was later often seen in the Asian combat zone during WWII. It remains to be seen however whether there was a later evaluation of the claims on one or the other side.

All that taken into account, it'd be surprising if there wasn't one or another captured airplane or, at least, wrecks in sufficiently good state to analyse the enemy's material.

Hope that can help you,

Kolya.