Here is another GMT, circa 1978, serial number 57XXXXX, which the seller states has a Rolex service dial. To quote the seller.
Specs on the watch:
REF: 1675 SN: 57695** MOVEMENT: 1570 NONE QUICK-SET AUTOMATIC
ROLEX MATT DIAL (NEW FROM ROLEX SERVICE CENTER)
ebay auction:
http://www.ebay.com/itm/Vintage-1978...item3f276e06da