Circular 26.5 mm
Colour: unknown
170 öre rate period 1.2.1978-15.6.1980
Most typical use: 15-20 gr air mail letter to North America paid at surface rate.
Items known:
A...2 6.4.1978 to Budapest (HU)
6.4.1978. Probably second rate cover. Correct rate 310 öre. Shortpaid 50 öre. Due handstamp then by mistake indicates double deficiency instead of single deficiency. No indication of postage due charged in Hungary