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postage
1988, Mar 25 100th Anniversary of the Bulgarian Railways issue unwmk p. 11
| X | 42st | multi | Diesel Locomotive 1963 | |||
| X | 60st | multi | Electric Train 1979 |
airmail
1958, Nov 18 International Geophysical Year issue
| - | 80st | grnbl |
1959, Feb 28 Luna 1 issue
| - | 2l | bl & och |
1959, Nov 11 Khrushchev visit to USA issue
| - | 1l | viobl & rose |
1960, Feb Zamenhof 100th issue
| X | 1.25l | multi | Rocket Plane in Front of Moon |
semipostal
1967, Sep 20 Winter Olympics 1968 issue
| - | 20+10s | multi | Alpine skiing |
1969, Sep 27 World championships artistic gymnastics in Varna issue
| - | 13+5s | multi | Exercise with the Ball | |||
| - | 20+10s | multi | Exercise with the Club |
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