| year |
first day |
country |
scott # |
agency |
conference |
conference dates |
conference city |
| 1980 | 21-jan | india | 851 | unido | 3rd unido general conference | 21 jan-8 feb 1980 | new delhi |
 |
| 1980 | 23-mar | argentina | 1261 | itu | regional administrative conference on broadcasting by hectometric waves for area 2 | 10-29 mar 1980 | buenos aires |
 |
| 1980 | 5-may | denmark | 663 | un | world conference of the un decade for women | 14-30 jul 1980 | copenhagen |
 |
| 1980 | 20-sep | libya | 871-872 | unesco | school scientific exhibition | 20-24 sep 1980 | |
 |
| 1980 | 23-sep | yugoslavia | 1503 | unesco | 21st unesco general conference | 23 sep-28 oct 1980 | belgrade |
 |
| 1980 | 27-sep | philippines | 1484-1485 | unwto | world tourism conference | 27 sep-10 oct 1980 | manila |
 |
| 1981 | 22-sep | south korea | 1273 | who | 32nd meeting, who regional committee for western pacific | 22-28 sep 1981 | seoul |
 |
| 1981 | 21-oct | australia | stamped envelope | unesco | 5th session, world heritage committee | 26-30 oct 1981 | sydney |
 |
| 1981 | 27-oct | china | 1721-1722 | un | asian conference of parliamentarians on population and development | 27-30 oct 1981 | beijing |
 |
| 1981 | 29-oct | uruguay | 1113 | unep | unep senior level meeting on environmental law | 28 oct-6 nov 1981 | montevideo |
 |
| 1981 | 4-nov | yugoslavia | 1552 | wipo | wipo/spatu technology conference | | belgrade |
 |
| 1982 | 27-apr | swaziland | 403-404 | who | 1st international conference on smoking and health - africa | 25-29 apr 1982 | |
 |
| 1982 | 12-may | finland | 670 | world bank imf | imf-world bank joint development committee meeting | 12-14 may 1982 | helsinki |
 |
| 1982 | 11-jun | un-vienna | 25 | un | 2nd un conference on peaceful uses of outer space | 9-21 aug 1982 | vienna |
 |
| 1982 | 9-aug | austria | 1219 | un | 2nd un conference on peaceful uses of outer space | 9-21 aug 1982 | vienna |
 |
| 1982 | 21-oct | kenya | 234-237 | itu | itu plenipotentiary conference | 28 sep-5 nov 1982 | nairobi |
 |
| 1983 | 2-mar | egypt | 1211 | un | 5th un regional cartographic conference for africa | 28 feb-7 mar 1983 | cairo |
 |
| 1983 | 6-jun | yugoslavia | 1633 | unctad | 6th unctad | 6 jun-3 jul 1983 | belgrade |
 |
| 1983 | 2-sep | russia | 5175 | unesco | 4th session of council, international programme for the development of communication | 5-12 sept 1983 | taschkent, uzbeck ussr |
 |
| 1983 | 3-oct | india | 1031 | unwto | 5th general assembly, world tourism organization | oct 1983 | new delhi |
 |
| 1984 | 19-jun | west germany | 1420 | upu | 19th universal postal congress | 18 jun-27 jul 1984 | hamburg |
 |
| 1984 | 16-jul | japan | 1565 | unesco | world congress of unesco clubs and associations | 16-24 jul 1984 | sendai |
 |
| 1984 | 6-aug | mexico | 1 v | un | 2nd international conference on population | 6-13 aug 1984 | mexico city |
 |
| 1984 | 11-aug | argentina | 1472 | fao | 18th fao regional conference for latin america | 6-15 aug 1984 | buenos aires |
 |
| 1985 | 1-jul | mexico | 1392a | fao | 9th world forestry congress | 1-10 jul 1985 | mexico city |
 |
| 1985 | 9-jul | bulgaria | 3072 | unwto | 6th general assembly, world tourism organization | sep 1985 | sofia |
 |
| 1985 | 15-jul | kenya | 341-344 | un | world conference to review and appraise the achievements of the un decade for women | 15-26 jul 1985 | nairobi |
 |
 |
| 1985 | 26-aug | italy | 1644 | un | 7th un congress on the prevention of crime and the treatment of offenders | 26 aug- 6 sep 1985 | milan |
 |
| 1985 | 9-sep | russia | stamped envelope | unesco | 2nd international symposium on plants and oxygen stress | 9-13 sep 1985 | moscow |
 |
| 1985 | 8-oct | south korea | 1443 | world bank imf | world bank imf annual meetings | 8-11 oct 1985 | seoul |
 |
| 1985 | 25-sep | bulgaria | 3101 | unesco | 23rd general conference | 8 oct-12 nov 1985 | sofia |
 |
| 1985 | 8-oct | bulgaria | 3102, stamped envelope | unesco | 23rd general conference | 8 oct-12 nov 1985 | sofia |
 |
 |
| 1986 | 25-apr | cameroun | 810-811 | eca | 21st session eca & 12th eca conference of ministers | 14-21 apr. 1986 | yaounde |
  |
| 1986 | 11-sep | russia | stamped envelope | unesco | international symposium on ivan franko and the world culture | 11-15 sep 1986 | lviv, ukraine |
 |
| 1986 | 15-sep | uruguay | 1221 | gatt | meeting of gatt contracting parties at the ministerial level | 15-19 sep 1986 | punta del este |
 |
| 1986 | 16-sep | kenya | 380-383 | itu | africa telecom 86 | 16-23 sep 1986 | nairobi |
 |
| 1988 | 26-jan | bangladesh | 305-306 | ifad | seminar on agricultural loans for rural women | | |
| 1988 | 16-may | brazil | 2134 | itu | americas telecom 88 | | rio de janiero |
 |
| 1988 | 22-aug | poland | 2862-2863 | fao | 16th fao regional conference for europe | 22-26 aug 1988 | krakow |
 |
| 1988 | 11-aug | west berlin | 9n572 | world bank imf | world bank imf annual meetings | 27-29 sep 1988 | west berlin |
 |
| 1988 | 14-nov | australia | stamped envelope | itu | 9th plenary assembly, ccitt and world administrative telephone & telegraph conference | 14-25 nov 1988 and 28 nov-9 dec 1988 | melbourne |
 |
| 1988 | | russia | stamped envelope | unesco | 2nd international conference of ministers & senior officials responsible for physical education & sport | 21-25 nov 1988 | moscow |
 |
| 1989 | 28-apr | colombia | c803 | un | 12th session, un commission on human settlements | 24 apr - 3 may 1989 | cartagena de indias |
 |
| 1989 | 23-may | france | 2154 | itu | itu plenipotentiary conference | 23 may-29 jun 1989 | nice |
 |
| 1989 | 11-sep | uruguay | 1290 | fao | 8th session fao intergovernmental group on citrus fruit | 11-15 sep 1989 | montevideo |
 |
| 1989 | 9-oct | russia | stamped envelope | wfuna | 32nd plenary assembly, world federation of united nations associations (ngo) | 9-14 oct 1989 | moscow |
 |
| 1989 | 19-nov | united states | 2434-2437 | upu | 20th universal postal congress | 13 nov-14 dec 1989 | washington |
 |
| 1989 | 24-nov | united states | c126 | upu | 20th universal postal congress | 13 nov-14 dec 1989 | washington |
 |
| 1989 | 27-nov | united states | 2438 | upu | 20th universal postal congress | 13 nov-14 dec 1989 | washington |
 |
| 1989 | 28-nov | united states | c122-c125 | upu | 20th universal postal congress | 13 nov-14 dec 1989 | washington |
 |
| 1989 | 1-dec | united states | ux139-ux142 | upu | 20th universal postal congress | 13 nov-14 dec 1989 | washington |
 |
