Squale 1521 Classic COSC Automatic Black Dial Steel Strap Men's Watch 1521COSCL.SQ20B

The Squale 1521 Classic COSC Bracelet combines the familiar proportions of the brand's best-known dive watch with the enhanced precision of a chronometer-certified movement. Crafted from 316L stainless steel, the case measures 42mm in diameter, 48mm from lug to lug and 12.5mm thick, balancing robust construction with everyday wearability. Beneath the flat sapphire crystal with its anti-reflective coating, the black dial features applied hour markers and hands filled with Super-LumiNova C3 for excellent legibility in low-light conditions. Framing the dial is a monodirectional bezel fitted with an aluminium insert and a sixty-minute diving scale, while the screw-down crown and screw-in caseback contribute to the watch's impressive water resistance of 50 ATM.

COSC-Certified Automatic Movement

Powering the watch is the Swiss-made Sellita SW200-1 automatic movement in COSC-certified specification. Operating at 28,800 vibrations per hour and equipped with 26 jewels, the calibre provides approximately 38 hours of power reserve while supporting both hacking and hand-winding functions. Certified by the Contrôle Officiel Suisse des Chronomètres, the movement undergoes independent testing to verify its precision and performance. Combining proven reliability with chronometer certification, the SW200-1 reinforces the professional credentials of the 1521 Classic COSC and distinguishes it from the standard models in the collection.

Stainless Steel Bracelet

The 1521 Classic COSC is paired with a brushed stainless steel bracelet that complements the finish of the case and enhances the versatility of the watch. Measuring 20mm wide and secured by a deployment clasp, the bracelet balances durability with everyday comfort while maintaining the purposeful character of the design. Its brushed surfaces contrast with the polished bevels of the case, creating subtle variations in texture that suit both underwater use and daily wear.

Squale 1521 Classic - COSC CERTIFIED

The defining feature of the 1521 Classic COSC is its chronometer-certified movement, making it the first model in the collection to receive official COSC certification. Alongside its enhanced precision, the watch introduces applied hour markers and a bezel painted entirely with Super-LumiNova, improving visibility in darker environments and setting it apart from the traditional 1521 Classic models.

Another hallmark of the collection is the crown positioned at 4 o’clock, a practical solution developed to improve comfort on the wrist and reduce the likelihood of accidental knocks during active use. Combined with the historic Von Büren case profile and professional diving specifications, the 1521 Classic COSC Bracelet offers a distinctive interpretation of one of Squale’s most enduring dive watches.