I see a very similar watch in print
I thought I had seen a similar watch in print and tonight I found it. Look on page 209 of "1001 Wristwatches from 1925 to the present", edited by Martin Haussermann and published by Paragon Publishing. Copywrite 2007 for the US edition. This GMT Autavia has a black 24 hour bezel, evenly numbered. The bezel does have the triangle at what would be the 24 hour hour marker, with the tritium dot in its center. The e-bay auction piece has fully 24 hour numbers, however. Otherwise, they appear pretty much identical. Perhaps someone made a very good, albeit black instead of blue and red, replacement bezel for aftermarket use at some time. Or, maybe Heuer did? I dunno. Hopefully Jeff will solve this mystery for us. Nevertheless, the e-bay watch is very attractive.
Steve