Circular 26.5 mm
Colour: unknown
170 öre rate period 1.2.1978-15.6.1980
Most typical use: Second rate foreign letter paid at first rate.
Items known:
Göteborg 1 29.5.1979 to Slanchev Brjaq
Göteborg 1 30.5.1979 to Slanchev Brjaq
30.5.1979. Second rate letter sent to Bulgaria. Correct rate 310 öre. Shortpaid 140 öre. Due handstamp indicates deficiency 140 öre and foreign letter rate 170 öre. There is no indication of due in Bulgaria.