Stamps of Portuguese Congo, 15c denom
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postage
1913 1913a issue ovpted on stamp of Macao unwmk p. 13.5 - 16
| - | 15c on 24a | bis | Vasco da Gama | — | — |
1913 1913b issue ovpted on stamp of Portuguese Africa (no wmk info) (no perf info)
| - | 15c on 150r | bis | Vasco da Gama | — | — |
1913 1913c issue ovpted on stamp of Timor
| - | 15c | on 24a (6) | — | — |
1914 Ceres issue
| - | 15c | Ceres | — | — |
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