Stamps of Guatemala, 300th Anniversary of San Carlos University of Guatemala issue
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1978, Dec 7 300th Anniversary of San Carlos University of Guatemala issue unwmk (no perf info)
| - | 0.06q | multi | .20 | .20 | ||
| - | 0.07q | multi | .20 | |||
| - | 0.12q | multi | .20 | |||
| - | 0.14q | multi | .20 |
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