They had tritium balls on the rehhaut. This one still has: Source: https://www.watchpool24.com/de/30734618/longines-chronograph-7413-flyback
I have not looked for T's on this reference but the watch looks fine. Below is another one, though the T's are in different spots. (source: https://zh.gmtbroker.com/gallery/An...7413-Jumbo-Flyback-30CH-very-photo851651.html)
Update: I’ve passed up on this watch. Whilst T’s might be correct, I didn’t like the positioning and spacings of the T’s
The T’s are correct, it’s a nice original dial and a watch that appears in good over all condition. As mentioned previously, there should be tritium plots on the crystal rehaut.
@BartH was that going to be a deal with a fellow collector? I’ve wanted one of these for quite some time.
Sort of. A buddy of mine found it at a small vintage jeweler and sent me the pictures. In the end I balked. Price was 4100 euro. If you like I can bring you into contact with him. Not sure if the watch is still available.