The auction is Bakelite Czechoslovak Pragotron P 273n industrial clock.
 Diameter 32 cm and a depth of 6,5 cm.
The clock has some scratches, appropriate age. No glass scratches.
 Convex glass cover, black painted embossed figures an bakelite dish,
painted black aluminum original hands.
Formerly a slave clock, it is now has a modern quartz movement  one AA battery.