Stamps, Coat of Arms of Cologne design
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Bulgaria
postage1991, Oct 21 PHILATELIA ’91 issue unwmk p. 13
| - | 86s | multi | Coat of Arms of Cologne | — | — | |
| - | 86s | multi | Coat of Arms of Cologne | — | — |
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| - | 86s | multi | Coat of Arms of Cologne | — | — | |
| - | 86s | multi | Coat of Arms of Cologne | — | — |