Roundel, three concentric stripes, white green red.
The roundel used today by the Bulgarian Air force (Bulgarski Voennovazdushni Sili - BVVS) is based upon the bulgarian national flag.
Red star, with a white border, in the middle, a roundel, with three concentric stripes, red white green.
Roundel used during the Warsaw Pact era, from 1948 to 1992.
Red star, with a white border, in the middle, a roundel, with three concentric stripes, white green red, with a white border.
Roundel used during the Warsaw Pact era, from 1948 to 1992. Variant of the former roundel.
