Hi Nick, have several 1970s/1980s Heuer catalogs with many many divers models but none of them shows the Diver-version with the red 24 hour markers below the luminous markers.
The Automatic diver is rare, and the 24hour dial version is extra -rare,
I also purchased this model on on Ebay, but it will take 3 weeks until my mother will bring it back home to me from her USA vacation. It has a black bezel insert with the "10, 20, 30, 40, 50" print on it.
Guess the bezels of the quarz models should also fit, as the case-measurements are the same.
Please see the poor picture of the ebay listing attached, a sharp pic of the bezel can be providet once I received it.