SEIKO 5 Sports Automatic Watch for Men

The SEIKO 5 watch features several key attributes that define its design and functionality. Firstly, it boasts an automatic movement, meaning the mainspring is wound by the motion of the wearer's arm rather than requiring manual winding. Secondly, the watch is water-resistant, providing protection against the elements. Thirdly, it is shock-resistant, making it durable and suitable for daily wear. Fourthly, the watch displays the date, and fifthly, it also features a day display - thus the "5" in the name SEIKO 5.

It's worth noting that some SEIKO 5 models may lack the day function, in which case they are referred to as SEIKO 4 watches, utilizing the Caliber 7S25 movement instead of the standard 7S26. Additionally, re-issued SEIKO 5 Sports models often employ the 7S36 caliber, which is similar to the popular 7S26 but features 23 jewels instead of 21.

Regarding the movement specifications, all of these SEIKO calibers beat at a rate of 21,600 vibrations per hour (bph) or 6 beats per second (bps). In comparison, the ETA 2824-2 movement, a common choice for many affordable automatic watches, beats at 28,800 bph or 8 bps, while the Miyota 82xx series operates at 21,600 bph.

These three movements - the SEIKO 7S26/7S36, the ETA 2824-2, and the Miyota 82xx - are found in a vast majority, estimated around 80%, of all inexpensive automatic wristwatches. This market dominance is now facing some competition from an increasing number of affordable automatic movements produced in China.

Mechanically, an automatic watch differs significantly from a quartz watch. While a quartz watch is powered by electricity, a mechanical watch, such as the SEIKO 5, is driven by a mainspring that must be regularly rewound, either manually or through the natural motion of the wearer's arm. This self-winding capability is a key feature of automatic watches, providing a more traditional and tactile horological experience compared to the battery-powered quartz counterparts.

The product details of the SEIKO 5 watch in question are as follows: it has a case width of 4.7 inches, a buckle-style clasp, a black/blue band, a silver-tone case, a scratch-resistant Hardlex crystal, and a stainless steel case with a black nylon strap. The watch face features a day/date display with Arabic numerals, luminous hands and markers, and the Hardlex mineral crystal ensures durability.

product information: