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postage
1981, Oct 1
16th Anniversary of Guyana Defence Force issue ovpted (no wmk info) (no perf info)
1984, Jun 15
World Forestry Conference 1984 issue ovpted
1986, May 15
125th Anniversary of Postal Service in Guyana issue ovpted (20 stamps)
1986, Oct 3
1986 surcharges f issue ovpted (10 stamps)
1986, Oct 15
International Food Day 1986 issue ovpted
1987, Feb 16
1987 surcharges b issue ovpted
1987, Feb 17
1987 surcharges c issue ovpted
1988, Jul 15
1988 surcharges g issue ovpted
1 to 39 of 39