Cortebert is probably best known for their railroad watches. They supplied both the Turkish as the Italian railways, though they used the Perseo brand name for the Italian railroads.
T.C.D. Demiryolları is the Turkish State Railways (Türkiye Cumhuriyeti Devlet Demiryolları), so this watch was for the Turkish railroad system.
It’s powered by the Cortebert 739, which is a rebranded Unitas 6325 movement, a so-called “Wehrmachtswerk”.
The movement with the stem release button, mobile stud holder, and KIF shock protection date this watch to the late 1960s.
This Cortebert did run but the amplitude was very low and the watch gained a lot of time. The hands also seemed to be misaligned and you couldn’t feel any resistance while setting the hands.