SEIKO 5 – the which means of the “5” A perfect marketer had the speculation within the 70ies: to be a SEIKO 5, the watch has to have the next 5 (five) attributes (thus the name SEIKO 5): 1. Automatic, 2. Water-resistant, 3. Shock resistant, 4. Date, 5. Day. Please note that a few SEIKO 5&aposs are if truth be told SEIKO 4&aposs, if the “Day” serve as is omitted, then the Caliber 7S25 is used. The one difference to the generally found 7S26 is the omission of the day wheel. Also re-problems with SEIKO 5 Sports regularly use the 7S36 caliber. Again the 7S36 is very similar to the preferred 7S26, yet it features 23 Jewels versus the 21 Jewels within the 7S26. Please note that a majority of these movements beat at a rate of 21&apossix hundred bph (beats per hour) or 6 bps (beats per second). As a comparison, an ETA 2824-2 beats at 28&apos800 bph or 8 bps. A Miyota 82xx beats at 21&apossix hundred bph. Why do I mention these three movements? Because they&aposre found in most definitely 80% of all reasonably priced automatic wrist watches. A market share that may be huge, yet challenged nowadays (2006) by an increasing share of reasonably priced China Made automatic movements An automated watch (often known as a self-winding watch) is a mechanical watch, in most cases with a balance wheel escapement, whose mainspring is wound by the motion of the wearer&aposs arm, as an alternative of getting to be wound manually on a daily basis. Whereas a quartz watch is powered by electricity, a mechanical watch is powered by a mainspring which will have to be rewound for the watch to keep time.