The Rolex GMT-Master II ref. 126713GRNR pairs Oystersteel with yellow gold in the two-tone configuration that has defined the GMT-Master's most dressy tier since the original gilt-accented references of the 1980s. What sets the 126713GRNR apart is its all-black Cerachrom ceramic bezel insert with yellow-gold numerals and pip — a monochromatic bezel on a two-tone case that collectors have taken to calling the "Root Beer" successor, though the colorway here is strictly black rather than the brown-and-gold of earlier generations. The case combines a brushed Oystersteel body with polished yellow-gold lugs and crown, the latter a screw-down Triplock crown visible at three o'clock. The black dial carries luminous round and rectangular hour markers, a triangle at twelve, a Cyclops-magnified date aperture at three, and a dedicated GMT hand tipped with a luminous triangle — all printed with "Rolex Oyster Perpetual Date / GMT-Master II / Superlative Chronometer / Officially Certified" in the dial's lower half, confirming COSC-level precision and Rolex's own Superlative Chronometer standard. The automatic movement drives independent hour, local-time, and GMT functions simultaneously. The two-tone Jubilee bracelet — five-link, alternating brushed steel and polished gold center links — is confirmed in the photos and suits the reference's dual-material case perfectly. The solid caseback, also confirmed in the photos, shows no engravings. Excellent with full Rolex box, papers dated September 27, 2023, serialized white tag, green tag, and wallet.