Pictured at Kastrup, Denmark, in 1969, this Bulgarian Air Transport Ilyushin Il-14 carries its registration, LZ-ILG, on the rear fuselage and the company’s earlier name, TABSO, on the fin.

Gabon’s military transports carry civil registrations, such as TR-KKB seen on a Lockheed L-100-20, to ease international travel.

The prefix PH has been the Dutch commercial marking since 1929. DH Dash 8 ’SDI was seen at London City in 1995.