The Rolex GMT-Master II reference 16710 with a black bezel is a highly sought-after timepiece, especially in “New Old Stock” (NOS) condition. GMT-Master II (ref. 16710) Black aluminum insert, giving it a classic and understated look. Production Period: 1998 swiss only dial, making NOS pieces rarer with each passing year New Old Stock: the watch is in brand-new, unused condition, often with factory stickers intact and never worn since it was produced. NOS examples are rare, especially for a model discontinued in 2007.