Rare uninterceptable normalized device, issued to telegraphists from 1931.
By reducing signal current and increasing the closing and opening time of the circuit, as well as by using well-insulated metal circuits and other innovative methods, it made telegraph communications uninterceptable.
Weight: approx. 4 kg.
It was carried over the shoulder
- Field telegraph
- Country of Origin
- Original/ Replica
- Fair condition
- 23.5×13.5×29 cm
- Comes with certificate of authenticity