There's an apocryphal story that a Soviet general was being shown a German tank factory during the cooperation under the Treaty of Rapallo. He asked to see the heaviest German tank and was shown the Panzer IV. The general, knowing that the USSR was currently developing the much heavier and well armored KV series, assumed that the Germans didn't want to show him the good stuff and filed a complaint with the foreign ministry that the Germans weren't holding up their end of the bargain.
There's an apocryphal story that a Soviet general was being shown a German tank factory during the cooperation under the Treaty of Rapallo. He asked to see the heaviest German tank and was shown the Panzer IV. The general, knowing that the USSR was currently developing the much heavier and well armored KV series, assumed that the Germans didn't want to show him the good stuff and filed a complaint with the foreign ministry that the Germans weren't holding up their end of the bargain.