Russian Factory Sign: Осторожно! блокировка неисправна

Orgin: Russia.
State: Used.
Material: Painted thick cardboard.
Size: 28x21cm

Orginal factory signs, some might have drill holes from where they once hang. 
Most are without and from storage.

Each hand painted and in it's way unique.

Sign reads: Осторожно, блокировка неисправна
can be translated into: Attention! Lock is faulty