I do find it puzzling that your gen is the later Chronometer dial according to Neon_7s info, yet it has that ETA font.
You may have one of a batch of rare Navitimers that didn't get the other font during assembly (since the 90s).... But it might get rectified in the next service?
I think I'd ask the AD the question Why? And if they don't know, I'd want Breitling to explain it?
I've just checked a well known UK AD who sells a number of the A13324 Navitimers, and amongst others they have:
**All with the Chronometer text**
Off white dial, bracelet, ETA font - dated Dec 2020
2x Off white dial, strap, ETA font - both dated Nov 2020
Off white dial, strap, Serif font - dated Dec 2020
Black dial, bracelet, Serif font - dated Feb 2020
Blue dial, strap, Serif font - dated Sept 2020
...now there's a curious mix...
I trawled the 'net and Chrono24 looking for Live pics of the A13324 with the ETA font and so far, it seems to be just the off white dial that has it. And it only seems to gravitate around the same AD above. I could be wrong though.
Wouldn't it be bizarre if "someone" bought a KOR navitimer to put the datewheel into the gen?!