If the aircraft you saw was the same one pictured in the link provided by Unique in repl #7, it was A300B4-200 registered TC
-MNE in a Turkish/TUI hybrid livery. The a.net photo attached below shows the same aircraft in service with its previous operator, Jetair/MNG, in TUI livery. For a summary of previous opeartors of this aircraft, click on the photo and read the caption.
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Photo © Michael Van Bosch