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| BC number(s): 5494, "120 years since the birth of Patriarch Cyril of Bulgarian" – one postage stamp with one vignette and a special postal stamp. |
| BC number(s): 5495, "Chinese New Year – Year of the White Metal Ox" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5496, 5496UV, "Chinese New Year – Year of the White Metal Ox" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5497, "100 years since the birth of John Glenn and 50 years since Apollo 14" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5498, "550 years since the birth of Albrecht Dürer" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5499, "150 years since the birth of Dame Gruev" – a postage stamp and a special postal stamp. |
| BC number(s): 5500, "100 years since the proclamation of Varna as a resort city" – a postage stamp and a special postal stamp. |
| BC number(s): 5501, "200 years since the birth of Georgi Stoykov Rakovski" – one postage stamp and a special postal stamp. |
| BC number(s): 5502, "50 Years of Air Transport Institute" - one postage stamp and a special postal stamp. |
| BC number(s): 5503, 5504, "Europe 2021 – Protected National Wildlife Representatives" – a series of two postage stamps and a special postal stamp. |
| BC number(s): 5505-5506, "Europe 2021 – Protected National Wildlife Representatives" – two postage stamps in a block and a special postal stamp. |
| BC number(s): 5507-5508, "Europe 2021 – Protected National Wildlife Representatives" – three series of postage stamps with one vignette each embedded in a carnet and a special postal stamp. |
| BC number(s): 5509, 5509UV, 5509K1, "60 years since the flight of the first man in space Yuri Gagarin" – a postage stamp in a block and a special postal stamp. |
| BC number(s): 5510, "100 Years of the National Academy of Music" by Prof. Pancho Vladigerov "" – a postage stamp and a special postal stamp. |
| BC number(s): 5511, 5512, "Cultural and Historical Heritage – "800 Years of Ivanovo Rock Monastery" – two postage stamps and a special postal stamp. |
| BC number(s): 5513, "Three Seas Initiative" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5514, 5515, "90 years since the establishment of diplomatic relations between Bulgaria and Argentina, joint edition" – a series of two postage stamps and a special postal stamp. |
| BC number(s): 5516, "30 years since the establishment of the Federation of Cultural and Educational Societies of the Karakachans in Bulgaria" – one postage stamp with one vignette and a special postal stamp. |
| BC number(s): 5517, "140 years since the establishment of the Naval Academy "Nikola Yonkov Vaptsarov" - one postage stamp and a special postal stamp. |
| BC number(s): 5518, "European Year of Railway Transport – 100 Years of the Rhodope Narrow Gauge" – two postage stamps in a block and a special postal stamp. |
| BC number(s): 5519, "30 Years of New Bulgarian University" – one postage stamp and a special postal stamp. |
| BC number(s): 5520, 5520UV, "Notable Travelers – Umberto Nobile" – a postage stamp in a block and a special postal stamp. |
| BC number(s): 5521, "400 years since the birth of La Fontaine" – a postage stamp in a block and a special postal stamp. |
| BC number(s): 5522, "160 years since the birth of General Ivan Kolev" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5523, "70 years since the establishment of the State Archives in Bulgaria" - one postage stamp and a special postal stamp. |
| BC number(s): 5524, "100 Years of the Bulgarian Youth Red Cross" - one postage stamp in a block and a special postal stamp. |
| BC number(s): 5525-5528, "70 years since the founding of the Graf Ignatievo Air Base" – a series of four postage stamps and a special postal stamp. |
| BC number(s): 5529, "200 years since the birth of Dostoevsky" – one postage stamp and a special postage stamp. |
| BC number(s): 5203А, "Congratulatory Notes: Science and Education - 50 Years of Shumen University "Bishop Konstantin Preslavski" - Block sheet with four postage stamps. |
| BC number(s): 5530, "Christmas 2021" – one postage stamp and a special postal stamp. |
| BC number(s): 5531, "450 years since the birth of Caravaggio" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5532, "Flora – predatory plants" – one postage stamp in a block and a special postal stamp. |
| BC number(s): 5533, "130 years since the establishment of the Military Medical Academy" – one postage stamp and a special postal stamp. |
| BC number(s): 5534, "25 years since the restoration of the activity of the Supreme Administrative Court" – one postage stamp and a special postal stamp. |
| BC number(s): 5064, 5064UV, " Congratulatory stamps Year of the Tiger. Chinese New Year" – a block-list with four postage stamps and a special postal stamp. |
| BC number(s): 5535, "125 Years of the National Academy of Arts" – one postage stamp with one vignette and a special postal stamp. |
| BC number(s): 5536, "40 Years of the National Endowment Fund "13 Centuries Bulgaria" – one postage stamp with a special postage stamp. |
| BC number(s): 5537, 5538, " Bulgarian scientists: - 125 years since the birth of Acad. Nikola Obreshkov and 125 years since the birth of Acad. Georgi Nadjakov" – a series of two postage stamps and a special postal stamp. |
| BC number(s): 5539, 5539, 30th Anniversary of the Founding of The Atlantic Club of Bulgaria – a series of two postage stamps printed in a small sheet and a special postal stamp. |
| BC number(s): 5540-5541, "Transport: 120 years since the launch of the first tram in Sofia" – two postage stamps in a block and a special postal stamp. |
| BC number(s): 5542, 5543, 5544, 5545, "Fauna - game" - a series of four postage stamps and a special postal stamp. |
| BC number(s): 5542-5545, "Fauna - game" - a series of four postage stamps, printed on a small sheet. |
| BC number(s): 5542-5545, "Fauna - game" – block with a series of four postage stamps |
| BC number(s): 5546, 5546, " Culture and Art: " 100 years since the birth of Margarita Duparinova and 100 years since the birth of Tanya Masalitinova ", and " 150 years since the birth of Panayot Pipkov and 125 years since the birth of Acad. Petko Staynov "" – a series of two postage stamps and a special postal stamp. |