Stamps of Guyana, 3 base month
1 to 50 of 640
postage
1968, Mar 4 1968a unwmk issue - wildlife (1968 Guyana) (no perf info) (15 stamps)
| X | 1c | multi | sunfish, w. unwmk | .20 | .20 | |
| X | 2c | multi | Pirai, w. unwmk | .20 | .20 | |
| X | 3c | multi | Lukunani, w. unwmk | .20 | .20 | |
| X | 5c | multi | Hassar, w. unwmk | .20 | .20 | |
| X | 6c | multi | Patua, w. unwmk | .20 | .20 | |
| X | 10c | multi | Marudi, w. unwmk | .20 | ||
| X | 15c | multi | harpy eagle, w. unwmk | .20 | ||
| X | 20c | multi | canje pheasant, w. unwmk | |||
| X | 25c | multi | cock of the rock, w. unwmk | .20 | ||
| X | 40c | multi | great kiskadee, w. unwmk | |||
| X | 50c | multi | Accouri, w. unwmk | |||
| X | 60c | multi | Tayassu tajacu, w. St Edwards crown & CA | — | — | |
| X | $1 | multi | Labba, w. unwmk | |||
| X | $2 | multi | armadillo, w. unwmk | |||
| X | $5 | multi | ocelot, w. unwmk |
1968, Mar 25 Easter 1968 issue
| X | 5c | multi | Christ of St John of the Cross, by Dali | |||
| X | 25c | multi | Christ of St John of the Cross, by Dali |
1969, Mar 10 Easter 1969 issue wmk. lotus bud mult
| X | 6c | multi | Sacrament of the Last Supper - Dali | .20 | .20 | |
| X | 25c | multi | Sacrament of the Last Supper - Dali | .20 | .20 | |
| X | 30c | multi | Sacrament of the Last Supper - Dali | .20 | .20 | |
| X | 40c | multi | Sacrament of the Last Supper - Dali |
1969, Mar 25 1968b wmk issue - wildlife (1968 Guyana) (15 stamps)
| X | 1c | multi | sunfish | — | — | |
| X | 2c | multi | Serrasalmus gymnogenys | — | — | |
| X | 3c | multi | Cichla ocellaris | — | — | |
| X | 5c | multi | Callichthys littoralis | — | — | |
| X | 6c | multi | Cichlasoma bimaculatum | — | — | |
| X | 10c | multi | Penelope jacquacu | — | — | |
| X | 15c | multi | Harpia harpyja | — | — | |
| X | 20c | multi | Opisthocomus hoatzin | — | — | |
| X | 25c | multi | Rupicola rupicola | — | — | |
| X | 40c | multi | Pitangus sulphuratus | — | — | |
| X | 50c | multi | Dasyprocta croconata | — | — | |
| X | 60c | multi | Tayassu tajacu | — | — | |
| X | $1 | multi | Cuniculus paca | — | — | |
| X | $2 | multi | Dasypus novemcinctus | — | — | |
| X | $5 | multi | Felis pardalis | — | — |
1970, Mar 24 Easter 1970 issue unwmk
| X | 5c | Descent from the Cross | .20 | .20 | ||
| X | 6c | Christ on the Cross | .20 | .20 | ||
| X | 15c | Descent from the Cross | ||||
| X | 25c | Christ on the Cross |
1971, Mar 22 wmk. lotus bud mult
| X | 5c | yelgrn & multi | anti-discrimination | .20 | .20 | |
| X | 6c | lilrose & multi | anti-discrimination | .20 | .20 | |
| X | 15c | turqbl & multi | anti-discrimination | .20 | .20 | |
| X | 25c | yel & multi | anti-discrimination | .20 | .20 |
1974, Mar 18 ovptedflowers (1971 Guyana)
| X | 8c on 6c | dlrose & multi | cannon-ball tree Couroupita guianensis | .20 |
1976, Mar 29 Guyana St John Ambulance 50th issue
| X | 8c | multi | Guyana St John Ambulance emblem | .20 | .20 | |
| X | 15c | multi | Guyana St John Ambulance emblem | .20 | .20 | |
| X | 35c | multi | Guyana St John Ambulance emblem | |||
| X | 40c | multi | Guyana St John Ambulance emblem |
1981, Mar 2 Wildlife 1981 issue - wildlife (1981)
| - | 30c | multi | Coendou prehensilis |
1 to 50 of 640