OK, so this is a lament for the TOC/GMT, which has now disappeared from Breitling's line-up. It was only ever offered as a limited edition, and perhaps the sales never took off. I am sad to see it go, and hope that at some point it may return.
For me, the most useful travel watch is one that has both a chronograph and a GMT function, and is versatile enough to wear casually, as well as in a business setting (in other words, no external rotating bezel). I had been looking for this kind of combination for some time before I discovered the TOC/GMT. To my mind, it is one of the nicest watches out there with this particular combination, bar none.
I think it would make sense for Breitling to bring back a GMT to the Transocean line. (Hey -- if you're crossing oceans, you need a GMT!!!) Offering GMT versions of the standard TOC would be great -- much the same as Breitling does with the Chronomat.
Ah, well. Guess we'll see what happens down the road. In the meantime, when I'm traveling, this one will be along for the ride...