A. Genin

Nahum Beychik, inventor

Vasili Bokarev

Surkov, master

Kuzma Yastrebetsky

Lopatin

Aleksandr Duletov

Kuzma, Surkov's son

Nikolai Akimov

Factory secretary

Ye. Bondina

Lopatina

T. Sokolovskaya

Nadya

F. Tarasov

Worker

S. Stepanov

Worker

V. Snezhinskaya

(uncredited)

Viktor Arkasov

Worker (uncredited)

Ivan Mutanov

Worker (uncredited)