Stamps of Guyana, 9600 ndenom
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postage
1982, May 17 1982 surcharges i issue unwmk (no perf info)
| - | $1.60 | blk & ltrd | ++on=3c |
1984, Jun 15 World Forestry Conference 1984 issue ovpted (no wmk info)
| - | 160c | on 50c (82) |
1986, Sep 23 Orchids 1986 g issue unwmk
| - | 160c | multi |
1988, Nov 3 Orchids 1988 h issue p. 13.75
| - | 160c | multi |
airmail
1982, Apr 23 1982 surcharges g issue ovpted (no wmk info) (no perf info)
| - | 160c | on 1.10($) (31) | ||||
| - | 160c | on 1.10($) (31) |
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