Although Serica has only been around since 2019, it feels like the young watch brand has been around for ages. In my opinion, a lot of that has to do with the maturity in which they conduct themselves, both in brand presence and progression. With any Serica novelty, you can bet that their approach to any watch design is performed with metronomic consistency – typically with minimal branding, steady visual cues, and a general inspiration by way of vintage military timepieces. It seems that any change that’s going to be made within each reference will be incremental, but that doesn’t mean the impact can be monumental. Such is the case with the new and improved Serica 5303 COSC Antimagnetic Diver Chronometer.
To understand the latest update to the Serica 5303, we must look within. Serica has opted to keep the movement within the Soprod family, but instead of using the previous Newton P092 automatic, the Serica 5303 COSC now draws its power from the Caliber M100. The Soprod Caliber M100 is buoyed by a glucydur balance, incabloc shock system, a 42 hour power reserve, and most importantly, a 3.2mm movement thickness. With approximately 1.4mm of extra room to play using the transitional movement inside of the 5303 COSC case, Serica has built in several antimagnetic pieces including a soft iron movement holder, soft iron dial and a soft iron inner caseback. As a result, the magnetic resistance for the Serica 5303 COSC diver has skyrocketed from the traditional Swiss standard magnetic resistance rating of 4,800 A/m to a sizable 50,000 A/m.