GMT with 1/2 hour adjustment ?

[cab56]

Hello. I have coworkers scattered around the world in different time zones. I currently have a dual time zone watch (large main dial for local time, small independent subdial for a second time zone).

I am interested in getting a GMT one of these days. My challenge is that I mostly communicate with coworkers who are 4 hours behind me or 8.5 hours ahead of me. My AD would love to sell me a GMT-II and has suggested that, although the GMT-II only handles full-hour offsets, that I handle the half-hour problem by rotating the bezel.

Any suggestions for Rolex (or non-Rolex) GMT watches that aren't limited to full-hour offsets?

Thanks in advance.
Chris