It's often done, but not always. Too much typing for people who post pics of their watches all the time. If you want to know where a guy got a watch from, you can always reply in the thread or send him a PM. (Don't be a pest and go overboard on PMs, though.)
I frequently write something like, "GMT-II C from _(some dealer)_".
The seconds-at-6:00 Daytonas are hit-and-miss: some guys report no problems for years while others say theirs stopped running after a few months.
Consider the "vintage" models with seconds-at-9:00; they may not be real accurate but there will be no/less problems with the movement.
There are still a few pre-2000 models out there, with seconds-at-9:00. The subdial spacing is off but if you don't mind, they're worth a look. Here's one (not from a recommended dealer on this site but he is a dealer on another site.
Link
He started with a 3-year-old "Retro" GMT from Josh which has, apparently, changed:
The dial is also from the old Retro watch.
If the dial had surrounds , it would be correct for the MK.4 and MK.5 GMT dials:
My watch is a prototype of sorts. He does need to figure out how to make the bezel insert fit better and one end links fits poorly on the watch. I believe he will offer these for sale when he gets some of these issues ironed out.
Maybe this watch is closer to a 16750? The dial is more 1984ish.
I picked this watch up from RolexAddict. It came with both Pepsi and black bezels, so it's a "transformer". Here is his description of mods (complete with his Frenlish spelling ):
The close ups let you see how well the aging was done.
I forgot to shoot the back of the extra bezel. If you're familiar with BK's excellent "Transformer" GMT, RA's bezels are held in place in a similar manner, except the wire is much thicker and holds the bezel much more securely than BK's (or at least the one I had). BK's bezel popped off once when I was wearing a French cuffed shirt. There's no way this one could pop off that easy.
He's also working on a 1675 "El Cornin
I know it can be done because dealers sell the upgraded "correct 10" bezel insert for upgrading.
PM member "ThinkBachs". He seems to know a lot about these DS reps.