Postal Mechanization in the USSR
(cont)
In the 1980s, envelopes were introduced with the heading MEZHDUNARODNOE - "Overseas" and 500 in the first three boxes to allow foreign mail to be segregated by the OCR machine at an early stage.
Front of cover with "500"
Information on back of cover
Back flap with nstructions
This Ukrainian QSL card, printed in 1980, has no rubrics at all.