Heuer airline

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Can anyone tell me about the origins/backstory for the airline?

the 80s/90s, quartz gmt watch with the time zones/cities engraved around the bracelet. A little eccentric but I quite like it.

Have looked through the guides on the main site but haven't been able to find anything. Was it a derivative of another line?
 
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I believe 1983/4.

There are two models in the range, one with a push-button GMT function and the simpler model with a traditional GMT hand