COSC's New Standard: Excellence Chronometer | A. Lange & Söhne's Chicago Boutique (2026)

The world of luxury watches is buzzing with exciting developments! But here's where it gets controversial: should watch accuracy standards be even stricter?

COSC Raises the Bar with 'Excellence Chronometer' Standard:

The Swiss Official Chronometer Testing Institute (COSC) has just unveiled a new, more demanding certification for mechanical watches, aptly named 'Excellence Chronometer'. This new standard aims to elevate the already precise COSC chronometers to an even higher level of accuracy and performance. While many might not notice the difference, watch enthusiasts will surely appreciate the enhanced regulation.

COSC's current chronometers are renowned for their daily rate tolerance of +6/-4 seconds per day. However, the new 'Excellence Chronometer' standard tightens this tolerance to just 6 seconds per day. But that's not all; it also demands increased magnetic resistance of at least 200 Gauss and independently verified power reserve durations. These watches will continue to undergo the rigorous 15-day testing under ISO 3159, but the cased movements must now meet these higher standards.

A. Lange & Söhne Expands to Chicago:

In other news, the renowned German watchmaker A. Lange & Söhne has opened a new boutique in the heart of Chicago. Located in the iconic Tribune Tower, this marks the brand's 9th retail location in the United States. Watch enthusiasts in the Midwest can now experience the brand's exquisite timepieces firsthand.

Charles Langlois, A. Lange & Söhne Brand President, Americas, expressed his excitement: "Chicago is a world-class destination for watch enthusiasts, and we are thrilled to invite them to explore our commitment to precision and tradition." The new boutique is a significant milestone for the brand's expansion in the Americas.

K-Pop Sensation Jung Kook Joins Hublot:

And now for a twist: K-Pop superstar Jung Kook, a member of the global phenomenon BTS, has been appointed as a global brand ambassador for Hublot. This move highlights the growing influence of K-Pop on a global scale, not just in Asia. Jung Kook's collaboration with Hublot is a strategic choice to capture the attention of a massive fan base.

"Hublot and music have a special connection, and I've always admired the brand's unique approach," said Jung Kook. This partnership fills a musical ambassador gap left by former Hublot ambassador Jay-Z, ensuring Hublot remains relevant in the music world.


But wait, there's more! The Time+Tide team has curated a selection of the week's highlights, including a new Toledano & Chan masterpiece, the latest from Louis Vuitton's Escale collection, and a 3-Watch Throw Down featuring the dynamic duo behind Wrist Check Pod.

So, what do you think about these developments? Are stricter accuracy standards necessary, or is it overkill? And how do you feel about K-Pop's growing influence in the luxury watch industry? Let us know in the comments below!

COSC's New Standard: Excellence Chronometer | A. Lange & Söhne's Chicago Boutique (2026)

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