Postal Mechanization in the USSR
The German firm AEG-Telefunken worked closely with the Soviet postal authorities in making various experiments and trials of postal mechanization methods from 1965 onwards.
The indicia on these two covers are tagged with fluorescent ink for facing machine trials.
Front of cover with tagged stamp from 1965.
Tagged Indicium
Information from back of envelope
Another example with a tagged indicium.
Tagged Indicium
Information from back of envelope.