40MM GMT Batman 126710BLNR (2025) Pre-Owned RolexThe Rolex GMT Master II 126710BLNR is the 40mm Oystersteel GMT with the black and blue ceramic Cerachrom bezel that collectors call "Batman." With rich aviation heritage, the original GMT Master was developed in the 1950s in collaboration with Pan Am Airways to help pilots track multiple time zones during long haul transcontinental flights. Unlike the Explorer II's fixed bezel, the Batman features a bidirectional rotating bezel. By coordinating the
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