The Timepiece Journal » FAQ

Everything you've ever wanted to know about COSC chronometer certification — answered clearly and concisely. From what the certificate means to whether it's worth paying for.

Expert answers to every common question about watch consumer rights and quality standards — the Three-Guarantee Policy, performance faults, timekeeping accuracy, appearance inspection, and professional ethics.

Expert answers to every common question about Swiss ETA movements — what ETA SA is, the Three Treasures (2824, 2892, 7750), supply restrictions, and whether an ETA movement means lower quality.