The Tudor Black Bay Pro Ref. 79470 with a white opaline dial is a versatile and highly capable GMT tool watch, offering a crisp and contemporary update to Tudor’s acclaimed travel companion, designed for the modern globetrotter who values both functionality and refined aesthetics . This 2025 release features a robust 39mm steel case with a fully brushed finish that exudes a rugged tool-watch feel, complemented by a fixed 24-hour graduated steel bezel and a satin-brushed steel bracelet with Tudor’s T‑fit clasp for rapid micro-adjustment, ensuring exceptional comfort and a perfect fit in any climate . The opaline white dial provides a clean, high-contrast canvas for the signature angular yellow “Snowflake” GMT hand, which, paired with the 24-hour scale on the fixed bezel, allows for effortless tracking of a second time zone, while a practical date window and luminous hour markers and hands ensure outstanding legibility in all conditions . At its heart beats the in-house Manufacture Caliber MT5652, a COSC-certified chronometer movement with a bidirectional rotor system, a silicon balance spring for superior anti-magnetic performance, and an impressive 70-hour power reserve, making it a reliable companion for both deep-sea exploration and transcontinental travel . Water-resistant to 200 meters (660 feet) and protected by a domed sapphire crystal, this 39mm timepiece is a true all-rounder, equally at home in the boardroom or on the tarmac, offering discerning collectors a perfect blend of heritage-inspired design, modern innovation, and rugged durability in a highly wearable and sophisticated package . Key specifications: 39mm steel case; opaline white dial with yellow GMT hand; Manufacture Caliber MT5652 (COSC) automatic movement; 70-hour power reserve; fixed 24-hour steel bezel; steel bracelet with T‑fit clasp; 200m water resistance; sapphire crystal .