Military History Museum Sofia.
Part of the exhibits are also several airplanes.
The first is MIG 21(Mikoyan-Gurevich 21, NATO reporting name: Fishbed). Fighter.
The first flight was in 1955 and in service by 1959.
In North Korea, these fighters are still in operation.
Mikoyan-Gurevich MIG 23 (Mikoyan-Gurevich 23, NATO reporting name: Flogger). Fighter.
The first flight was in 1962 and in service by 1970.
I’ve looked exercises with this aircraft. In 1986, I watched a group of planes attacked targets with missiles.