Vintage Pragotron PK-27 clock

Vintage industrial round wall clock, Czechoslovakia 2nd half 20th century. The Pragotron PK 27 is an indoor secondary clock. Meaning it used to be moved by electrical impulses from its mother clock. The frame is made ​​of hard plastic, the front is protected by glass. The clock is converted to a battery-powered quartz mechanism (1 x AA battery), and now functions independantly!