Squale 1521 Classic COSCvsSynchron Ti300M Poseidon Deep Black

Owners widely praise the Squale 1521 Classic COSC's well-proportioned 42mm case, with one reviewer calling it a masterclass in case design. The COSC certification is noted to improve accuracy, and the bezel indices are now fully lumed, a feature some owners find superior. The brushed case with polished chamfers is described as a significant and attractive aesthetic update. However, some owners prefer older bezel designs, and opinions on the lume are mixed, with one user finding it only "okay." One owner reported moisture ingress after a shower due to a loose case back on a new watch. The Squale 1521 Classic COSC is priced at CHF 1,475 and uses a Sellita SW200-1 movement. Overall, owners rate the Squale 1521 Classic COSC highly for its updated finishing and improved accuracy.

The Synchron Ti300M Poseidon Deep Black is praised for its wearability, attributed to its lightweight titanium construction and a 11.9mm case thickness, making it comfortable even under a cuff. Reviewers note its retro aesthetic and good legibility with a glossy black dial. Owners and reviewers find the La Joux-Perret G100 movement to be a high-grade caliber. The watch is considered a good value, with some sources citing a price around $990-$999. On balance, owners and reviewers rate the Synchron Ti300M Poseidon Deep Black highly for its comfortable titanium build and attractive vintage-inspired design at its price point.