These Diving Watch Movements Have Been Quietly Upgraded

The new TAG Heuer Aquaracer PROFESSIONAL 300 watch features a new caliber: the TH31-00, compared to the previous model's caliber 5. Developed in collaboration with AMT, a high-end movement manufacturer, this movement features a 28,800 vibration frequency, an 80-hour power reserve, and COSC-certified chronometers. The family-style design, including the signature dodecagonal rotating bezel, is enhanced with an optimized case shape, reducing the case diameter from 43mm to 42mm and the overall thickness from 12.5mm to 12mm for a more comfortable fit. The detailed, wave-patterned dial is also a hallmark of the new PROFESSIONAL 300. Best TAG Heuer Aquaracer look alike watches for sale at Lookalikewatchsale.co.

The B31 movement is a major Breitling highlight for 2025. Its introduction breaks the pattern of Breitling's basic functional watches being limited to outsourced movements or the B20 caliber. Compared to the B20, the B31 caliber boasts a significantly higher degree of in-house production, representing another pioneering achievement for Breitling in the field of in-house movements, following the B01. The Breitling B31 boasts exquisite details, including a Geneva-style finish on the bridges, circular-grained finish on the lower plate, and a skeletonized rotor. Regarding its specifications, the B31 has a diameter of 28.4mm, 26 jewels, a frequency of 28,800 vph (4 Hz), a 78-hour power reserve, and is COSC-certified.

Starting with the Black Bay Ceramic model, Tudor has submitted some of its movements for certification by the Swiss Federal Institute of Metrology (METAS). Now, the brand has expanded the scope of METAS certification. The latest Black Bay 1958 dive watch, released in 2025 in burgundy, features the first in-house MT5400-U movement, certified by the METAS Master Chronometer. This movement has a diameter of 30.3mm, a thickness of 5mm, 27 jewels, and a power reserve of 65 hours. Thanks to a silicon balance spring, it also boasts a magnetic resistance of 15,000 gauss, a characteristic of the METAS Master Chronometer certification.