Quoted from TomDK:Rumours also tell about a third machine in Germany.
It might be shipped to the German NOVA in Hamburg. NOVA was the general distributor. IPDB says, it was in Hamburg but send back, rumours say: Not send back , officially destroyed, still in a private collectors hand.
If it is in the collectors hand I guess, he has more than 700 machines in his collection and a "holy gameroom" were the Pinball Circus is expected.
Maybe one day we will now .....
I think you are correct . The guy who sells the playfield protectors in Germany his friend is a insane collector and I believe he has it. He also have other prototypes that had to be destroyed but still there…