What does 21 jewels mean on a Seiko 5 automatic watch?
Automatic Movement: The SEIKO 5 is an automatic watch, meaning it is self-winding. It harnesses the motion of the wearer’s arm to wind the watch automatically, eliminating the need for a battery. Jewels: The 21 Jewels designation refers to the number of jewel bearings used in the watch’s movement. It’s built to last, thanks to its robust construction and dependable movement. And it offers incredible value for money, making it an accessible option for watch enthusiasts of all levels. If you’re new to the world of automatic watches, the Seiko 5 Sports Automatic is an excellent starting point.When cared for properly, automatic watches can last a lifetime and more. Maintenance and replacing old gears and springs can extend the life even more. The mechanical watch parts require great attention to detail and skill to replace.If you don’t wear your automatic watch for a couple of days, it will stop on its own. Unless you want to wear your watch every day, you do not need to worry about winding your automatic watch. Just like manual watches, you can leave your automatic watch unwound for long periods without damaging the movement.
What does “21 jewels” mean in watches?
This means that the entire mechanical movement, from the balance wheel all the way to the center wheel pivot, has enough bearings in place to function correctly. Higher-end watches will often feature a minimum of 21 jewels, with a few extra stones being added to reduce positional errors. A basic mechanical watch typically contains 17 jewels, which is usually enough to support all the critical friction points. Watches that include additional features, such as automatic winding systems or calendar functions, may have 21 or more jewels to accommodate the extra moving parts.
How to spot fake Seiko 5/21 jewels?
On real Seiko models, the lettering is thicker and evenly spaced. Below the 6:00 marker, there is orange text that reads “DIVER’S 200. Below that, there is text that reads “21 Jewels. On replica watches, this orange is often replaced with red, the font is noticeably thinner, and the “21 Jewels” text is gone entirely. Inspect the Case Back and Serial Numbers A genuine Seiko watch will have an engraved serial number that matches the one listed on official documentation (warranty card, box, etc. Fake watches often have serial numbers that are poorly engraved or even missing. Another indicator of authenticity is the case back design.Dating Vintage Seikos That brand is Seiko. On the back of every Seiko watch is a serial number that can be used to date the year of production of the watch. The first digit of the serial number is the year of the decade in which the watch was built. So a watch made in 1971, will have a serial number that starts with 1.To know if a seiko is real, simply look at the back of the case to discover 3 elements: the seiko serial number, the movement caliber (7s26, 4r36) and the box number. The internal movements of authentic seiko watches are often marked with specific information.Seiko watches are made in Japan in essence, but technically they can be produced in other Seiko-owned facilities in Malaysia, Singapore, and China.