Synchron launches the POSEIDON Ti300M: A Modern Titanium Tribute to 1970s Dive Watch Heritage Synchron, renowned for reviving brands like Aquadive, Synchron, Tropic straps, and ISOfrane, today announced the launch of the SEALAB Ti300M, a professional dive watch that sets a new benchmark in titanium watchmaking and underwater performance.
The SEALAB Ti300M derives its name from its defining characteristics: a titanium case paired with 300-meter water resistance. An homage to the great dive watch creations of the 1970s, the SEALAB Ti300M is the first model in Synchron’s new SEALAB line, updating classic proportions with modern materials and engineering. With a 41mm diameter and 11.9mm height, the watch balances wearability with professional dive watch functionality.
“The SEALAB Ti300M embodies our vision of watchmaking that honors tradition while embracing the future,” said Rick Marei, CEO of Synchron. “Every component has been meticulously engineered to deliver exceptional performance and enduring beauty that our clients expect from a Synchron timepiece.
The new Synchron Titanium. Built with Poseidon. Built to dive.
Ten years ago, Synchron and Poseidon began working together — two houses with deep roots in their own fields, brought together by a shared conviction: the diver comes first. A decade on, that partnership has shaped a tool watch tested where it matters, in the water.
The new Synchron Titanium is the lightest expression of that philosophy yet. 50 grams. 11.9 mm thin. Light on the wrist, easy under a wetsuit, comfortable from the first dive of the day to the last. Grade titanium delivers the toughness of a professional instrument with a wearability few dive watches can match.
Both brands carry rich histories of their own. Poseidon helped define modern diving equipment. Synchron, from the golden age of dive watchmaking, shaped the tools the industry was built on — including the legendary TROPIC® strap. The new Titanium channels that combined heritage into something modern, light, and unmistakably purposeful.
Professional specs. Honest price. No theatre.
Synchron Titanium — built to dive.
The Synchron Ti300M POSEIDON is 41mm in diameter, 45mm lug-to-lug and 11.9mm thick, while the dial and bezel diameter are the same as the Synchron Military, giving it comfortable proportions that feel right without being oversized. It’s made from Grade 5 titanium, which is noticeably lighter than steel and more comfortable for daily wear. The 300-meter water resistance and screw-down crown make it capable as a proper tool watch.
Inside is an LJP G100 movement, a Swiss automatic with a 60-hour power reserve. That’s about double what you’d get from the more common Sellita SW200, which means the watch will still be running on Monday morning even if you didn’t wear it all weekend.
At exactly 50 grams and just 11.9mm thin, the Synchron Titanium is a watch you constantly catch yourself admiring, the sunshine yellow dial framed against a brushed titanium case is impossible to ignore, yet one you forget is even on your wrist. The 41mm case sits flat thanks to a short 45mm lug-to-lug and a slim profile that slides effortlessly under any cuff, dress shirt or wetsuit alike. Grade 5 titanium warms to body temperature almost instantly and never feels cold or top-heavy the way a steel diver can after a long day. Paired with a supple Genuine Tropic® strap, the result is a watch you want to look at, and one so comfortable you can wear it from a morning dive to a dinner reservation without ever wanting to take it off.
The G100 is a direct replacement option for the ETA 2824-2 or SW200-1 due to sharing identical dimensions. However, the G100 is not a mere clone with a "Swiss-made" badge stamped on it. Instead, it represents a thoughtful re-engineering of proven technology.
La Joux-Perret freely admits that development of the G100 started with the Miyota 9-Series, but they've made significant improvements. The rotor is fashioned from a single piece of tungsten for superior winding, and the G100 balance is fitted with a KIF anti-shock system—the same trusted supplier that provided High-End Swiss brands.
At $990 pre-order price, it's priced to compete against any Swiss titanium dive watches. You can pair it with an authentic Tropic or ISOfrane strap—both brands that Synchron makes.
SYNCHRON Ti300M POSEIDON |Â Limited Edition
Poseidon:
Founded in Sweden in 1958, Poseidon has spent more than six decades at the forefront of diving equipment. From the first single-hose regulator to advanced rebreathers used by professional and military divers around the world, the brand has built its reputation on engineering that performs when conditions are at their hardest. Poseidon doesn’t follow the diving industry — it has helped define it.
Synchron:
The Synchron name has a storied place in Swiss watchmaking. From 1968 to 1980, Synchron was a Swiss holding company that brought together three historic houses — Cyma, Doxa, and Ernest Borel — uniting some of the most respected names of the era under a single roof in Le Locle. After the quartz crisis dispersed the original group, the Synchron name was reborn decades later with the same spirit: to preserve and revive the great heritage brands of Swiss diving and watchmaking. Today’s Synchron is the steward of legendary names including Synchron, Aquadive, TROPIC®, and ISOfrane — and the maker of its own focused collection of purposeful dive watches
