The HZ6460 does come with a Rolex position and font DWO installed. I've used 3 or 4 of them and the DWO placement has been acceptable in all cases, though tbh not perfect. Not sure if it's the dial or the DWO but the dates tend to appear a little left justified. Also one came not centered vertically, I had to realign it. I haven't tried one with a 1675 dial, I can't seem to get traction with a rep for that model.
My tolerance for left justified dates in reps has increased, Noob is bad about that. You simply can't put a gen DW in every rep. This rep has a stock HZ6460 with unmodified DWO.
Another nice rep GMT movement I've used comes from vendor bosshua007. If you buy the item with 6-digit dial and hands, it has a Rolex position and font DWO. Hands and dial are OK (except GMT hand) for beater projects, lume is not great. Boss also sells on ebay at slightly higher prices.
http://watchaccessory.net/e_products...t-test2-2.html