
As with its U1, the Frankfurt-based brand hardens only the rotating bezel of the U50. Furthermore, it can be hardened very effectively via Sinn’s “tegementing” process.

The material is extremely resistant to saltwater, so it’s particularly well suited for the cases of dive watches. This is the same alloy that’s used for the hulls of Germany’s most up-to-date submarines. As it did with some previous models, Sinn again opts to use submarine steel here. You can also see the watches’ differing character in their cases. The chic curved crystal of the Aquis has anti-reflective coating on its underside, but reflections on the front allow you to take an inconspicuous look behind you as you read the time. The U50’s crystal has anti-reflective coating on both sides and is extremely transparent. Sinn has also arranged to have the DNV GL, the world’s leading classification authority and a recognized advisor for the maritime industry, certify the U50 according to the European standard for diving equipment. With water resistance to a depth of 500 meters, the Sinn offers considerably more reserves than the Oris, which is pressure resistant to 300 meters, although even this lesser value is more than sufficient.

These two very different concepts are also reflected in the watches’ functionality. After all, even a dive watch spends most of its time on terra firma.

While Sinn does everything it can to make its watch into an ideal companion for divers, Oris also strives to shine on dry land. Oris, on the other hand, alternates polished and satin-finished surfaces, decorates the blue dial with a sunburst finish, and lets the polished ceramic scale on the rotating bezel sparkle in the sunshine along with the polished hands and hour indexes.
#ORIS AQUIS DATE CALIBRE 400 REVIEW PROFESSIONAL#
The U50 thus instantly distinguishes itself as a professional tool watch. Nothing reflects glaringly here and each element serves a practical function. Sinn bead-blasts the case and strap, relocates the crown away from the back of the hand to the 4 o’clock position, trims the dial with instrumental styling and optimizes legibility thanks to strong contrast between applied luminous material and a matte black background. These two moderately sized dive watches are visually very different from each other. These watches are more comfortable to wear, they aren’t so top-heavy, and they’re less likely to get caught on nearby objects, especially the U50, which is only 11.15 mm high. The smaller dimensions of the models presented in 2020 have tangible advantages. They have responded to their customers’ requests for a more moderately sized divers’ watch. Sinn and Oris emphasize this with the 41-mm U50 and the 41.5-mm Aquis Date, our test watches. The victory march of gigantic watches is over today’s trend is toward moderately sized timepieces. And their larger role models (the 44-mm Sinn U1 and the 43.5-mm Aquis Date) remain in the brands’ portfolios. Fortunately, however, these watches haven’t become quite as tiny as the children in the 1989 movie, Honey, I Shrunk the Kids. And Oris is making a scaled-down version of its Aquis Date. “Honey, I shrunk the U1” is the headline of Sinn’s ad for its new U50. What can these 41- and 41.5-mm-diameter newcomers do? Find out in this comparative review from our October 2020 issue, with original photos by Nik Schölzel.

Oris and Sinn have released smaller versions of their popular dive watches, the Aquis Date and U50.
