Bicolour GMT-Master II model 16713 T on Oysterlock 78793A bracelet with unusual brown "root-beer" dial and matching bezel insert. In fine condition with Rolex boxes, GMT-Master booklet, chronometer swing-tag and UK papers from Mappin & Webb dated October 2005. The NEW equivalent is now £8,650 but these older models have their own value among the collector following and the "root-beer" version is especially hard to find.