Stamps of Bulgaria, 31 base day
1 to 50 of 140
postage
1921, Dec 31 Bourchier death issue unwmk p. 12 (9 stamps)
1947, Jan 31 Red Cross (1946) p. 11.5 (8 stamps)
1947, Aug 31 Plovdiv Fair 1947 issue
| - | 4l | brtrd | exhibition building | |||
| X | 9l | viobrn | Residence of the French Poet Lamartine on his Journey to the | |||
| - | 20l | ultra | Fair Poster |
1948, Mar 31 1948 activities issue (no perf info)
| X | 4l | red | person reading | |||
| X | 20l | bl | girl with accordion | |||
| X | 40l | grn | Working People as Listeners | |||
| X | 60l | Sportswoman with Medicine Ball |
1949, Oct 31 frontier guards
| - | 4l | redbrn | ||||
| - | 20l | graybl | Guard on a River |
1955, Aug 31 Plovdiv Fair 1955 issue p. 13
| X | 4s | dpbrn | entrance to 1892 fair | |||
| X | 16s | dkcarrose | Bulgarian Fruits | |||
| X | 44s | olblk | fruits | |||
| X | 80s | dpbl | Fair Poster |
1955, Oct 31 writers (1955) (6 stamps)
| X | 16s | brn | Friedrich von Schiller | |||
| X | 44s | brnred | Adam Mickiewicz | |||
| - | 60s | prusbl | Hans Christian Andersen | |||
| - | 80s | Baron Charles de Montesquieu | ||||
| - | 1l | Miguel de Cervantes Saavedra | ||||
| - | 2l | Walt Whitman |
1961, Mar 31 birds (1961 Bulgaria) p. 11 (6 stamps)
| X | 2s | multi | Tetrao urogallus | |||
| X | 4s | multi | Pelecanus crispus | |||
| X | 16s | multi | Phasianus colchicus | |||
| X | 80s | multi | Otis tarda | |||
| X | 1l | multi | Gypaetus barbatus | |||
| X | 2l | multi | Tetrastes bonasia |
1963, May 31 World Wrestling Championships 1963 issue p. 11.5
| X | 5s | wrestling Scene | ||||
| X | 20s | wrestling Scene |
1963, Aug 31 Riccione 1963 issue p. 11
| X | 2s | multi | ||||
| X | 3s | multi | ||||
| X | 13s | multi |
1971, Jul 31 80th Anniversary of the Congress of Buzludja issue p. 12.5
| - | 2s | memorial stone |
1977, Mar 31 World Rheumatism Year issue p. 13
| X | 23s | multi | The Knee Joint |
1978, May 31 World Festival of Youth and Students 1978 issue p. 13.25x13
| X | 13st | multi |
1 to 50 of 140