Tudor Black Bay GMT One

About this reference

The Tudor Black Bay GMT reference M79830RB entered production in 2018 and remains a staple in the current catalog. Collectors value this model for its COSC-certified manufacture caliber MT5652, which features a jumping local hour hand for true GMT functionality. The 41mm stainless steel case houses a matte black dial and a bidirectional rotating bezel with a burgundy and blue anodized aluminum insert, often referred to as the "Pepsi" configuration. While early production units were known for a date-wheel complication issue, later iterations corrected this mechanical flaw. On the secondary market, this reference typically trades between $2,800 and $3,600 depending on the bracelet type and condition. A notable variant is the "Opaline" dial version introduced in 2023, which features a silvery-white finish instead of the standard black, though the stainless steel construction and internal specifications remain identical.