2017 was a pivotal year for the Breitling Superocean Heritage collection. It marked the year Breitling began incorporating the B20 movement, derived from the Tudor MT5612, into the series. This should have been a great achievement, but the problem was that despite using a higher-grade movement, Breitling stubbornly refused to allow the case back to be transparent. I honestly didn't understand Breitling's thinking at the time, as it simply didn't make sense. After eight years, Breitling apparently finally figured it out, and the new Superocean Heritage collection not only features a transparent case back but also utilizes Breitling's new in-house B31 movement.
The B31 movement, developed over four years, garnered unprecedented attention upon its debut. Firstly, its dimensions are 28mm in diameter and 4.8mm thick, making it not only smaller and thinner than the B20, but also perfectly suited to watch cases ranging from 38mm to 44mm. In terms of performance, the movement beats at 28,800 vibrations per hour and boasts a 78-hour power reserve. Best cheap watches online, discover our affordable replica Breitling Superocean Heritage watches collection.
Not only has it passed the Swiss Official Chronometer Testing Institute (COSC) certification, keeping the error between -4 and +6 seconds per day, but it has also undergone Breitling's rigorous 16-year accelerated aging simulation test, which is far more stringent than industry standards and designed specifically for in-house movements. In this extreme test, the crown is wound 100,000 times to ensure the durability of the gear train; the rotor is rotated 3,456,000 times to evaluate the efficiency of the automatic winding; and finally, the movement is subjected to 60,000 500G shocks to verify its shock resistance, thus ensuring that the movement can operate stably for a long time in extreme environments.
Ultimately, the excellent movement results in an excellent case size. Although the new Breitling Superocean Heritage series, equipped with the B31 movement, offers three case diameters—40mm, 42mm, and 44mm—the thickness of all three is successfully kept below 12mm. The 40mm version, in particular, is only 11.73mm thick. This is a far more comfortable size than the 14mm or more thicknesses of the B20 era. Besides the reliable thickness, the first appearance of a 40mm case diameter in this series is also a pleasant surprise. Personally, I believe 40mm is the perfect size for a dive watch, a point proven by the Submariner of yesteryear and the current limited-edition Classic Fifty Fathoms.
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