In the flat of the retired opera singer Bílek there is a meeting of people wishing to exchange their flats. The "duodeca-exchange" is organized by a lawyer Radosta (

Kulový blesk

In the flat of the retired opera singer Bílek there is a meeting of people wishing to exchange their flats. The "duodeca-exchange" is organized by a lawyer Radosta (Rudolf Hrusínský), who labeled the action "the lightning ball". The preparations are accompanied by many unexpected problems.

1979 film directed by Ladislav Smoljak and Zdeněk Podskalský

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