This is actually Aero 45 OK-EGN, restored to represent an aircraft used by the Czechoslovak National Security Corps after WWII for patrol work

Now preserved at the "Stará Aerovka" collection at Prague - Letňany (LKLT). In the past the Aero aircrafts were built in this and another hangar at Letňany.

After WWII, the Czechoslovak Security Air Force of the National Security Corps used Ae-45 adapted for patrol and liaison duties. Only the tail of the real OK-BYE (cn 50076) has survived but has proved a valuable colour reference, along with photographic evidence for the restoration of OK-EGN in its place The finished aircraft is now on display in a brand new hangar at the super Kbely museum.