WATCH MARKING GUIDES
Go beyond individual marks. These guides explain the systems behind watch markings — how water resistance ratings work, what caliber numbers reveal, how to read material stamps, and more.
Have a marking you can't decode? Upload a photo and get instant AI analysis — no guide-hunting required.
Try AI Watch Check
Water Resistance Markings on Watches — What Do They Really Mean?
Water resistance markings are among the most commonly misunderstood indicators on a watch. Numbers like "50M", "100M", or "10 BAR" appear on case backs and dials, but their meaning often differs from what buyers expect. Understanding these markings can help you make informed decisions about what activities are safe for your timepiece.
Watch Movement Markings — Caliber Numbers, Jewel Counts & Origin Stamps
The movement (or calibre) is the engine of a watch, and the markings engraved or printed on it reveal key information about its origin, complexity, and capabilities. Caliber numbers, jewel counts, and country-of-origin stamps can help identify when and where a movement was made, and what features it may offer.
Watch Case Material Stamps — Stainless Steel, Gold, Titanium & More
Case material stamps identify what a watch case is made from. Common markings like "STAINLESS STEEL", "SS", "TITANIUM", or gold hallmarks help determine the composition and potential value of a timepiece. Understanding these stamps is essential for assessing both authenticity and material quality.
Country of Origin Marks on Watches — Swiss Made, Japan Movt & More
Country-of-origin markings on watches indicate where key components were manufactured or assembled. Labels like "Swiss Made", "Japan Movt", and "Made in Japan" are regulated by trade laws and carry specific requirements about the proportion of manufacturing that must occur in the indicated country.
Buying Watches from Japan — What the Markings Mean
Japan is one of the world's largest watch markets, and Japanese sellers offer everything from affordable Seiko divers to rare JDM-exclusive models. Understanding the markings on watches sold from Japan — including kanji inscriptions, domestic model codes, and regulatory stamps — helps buyers make informed decisions and verify authenticity.
Have a marking you can't decode?
Upload a photo and get instant AI analysis — no guide-hunting required.