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Blog
Evergreen explainers and answers to the questions serious buyers ask — certification, marketplaces, value and more.
What Is COSC Chronometer Certification?
COSC certification, explained plainly: what it tests, the −4/+6 s/day tolerance, and how Rolex and Omega go further.
Read more →Is Chrono24 Legit? A Buyer's Safety Guide
Chrono24 is a legitimate watch marketplace — but trust varies by seller. How its protections work and how to buy safely.
Read more →Are Watches a Better Investment Than Gold?
Luxury watches vs gold bullion as a store of value — liquidity, spreads, volatility and why most watches depreciate.
Read more →Automatic vs Quartz vs Manual Watches: What’s the Difference?
Automatic, quartz, and manual movements compared: how each works, plus accuracy, maintenance, winding, lifespan, and which suits which buyer.
Read more →Watch Movements Explained
A plain-English guide to watch movements: mechanical vs quartz, the key parts, frequency and power reserve, in-house vs supplied calibers, and why it matters.
Read more →Watch Water Resistance, Explained
What 30m, 50m, 100m and 300m really allow, the difference between ISO 22810 and a certified diver's watch under ISO 6425, and why the depth figure is a lab test rather than a limit.
Read more →Watch Complications, Explained
Chronograph, GMT, annual and perpetual calendar, moon phase, power reserve, world time, repeater and tourbillon — what each does, what it costs to own, and which are worth it.
Read more →Do Rolex Watches Hold Their Value?
The model-by-model answer: which Rolex references trade above retail, which quietly lose money, why the brand holds value at all, and what a premium over list actually means for a buyer.
Read more →Is Jomashop Legit?
Jomashop assessed honestly — what gray market really means, the warranty trade-off that decides the purchase, what the trading record shows, where complaints cluster, and when to use it.
Read more →Watch Case Materials Explained
316L vs 904L steel, why titanium grade matters more than the word titanium, the hardness-versus-toughness trap in ceramic, 18k gold alloys and bronze patina — with a material-by-use table.
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