SEIKO 5 Automatic Blue Dial Men's Watch

A great marketer had the idea in the 1970s to establish the concept of the SEIKO 5, a watch that must possess the following five attributes: automatic winding, water resistance, shock resistance, a date display, and a day display (thus the name "SEIKO 5"). It is important to note that some SEIKO 5 models are in fact "SEIKO 4" watches, as they omit the day display function and instead use the Caliber 7S25 movement, which differs from the more common 7S26 only in the absence of the day wheel.

Additionally, many re-issued SEIKO 5 Sports models employ the 7S36 caliber, which, while similar to the ubiquitous 7S26, features 23 jewels compared to the 21 jewels of the 7S26. All of these movements operate at a frequency of 21,600 beats per hour (bph) or 6 beats per second (bps), in contrast to the 28,800 bph or 8 bps of the ETA 2824-2, and the 21,600 bph of the Miyota 82xx movements. These three movements are found in approximately 80% of all affordable automatic wristwatches, a market share that, while substantial, is currently being challenged by an increasing presence of inexpensive automatic movements from China.

An automatic watch, also known as a self-winding watch, is a mechanical timepiece with a balance wheel escapement, where the mainspring is wound by the motion of the wearer's arm, eliminating the need for manual winding on a daily basis. This is in contrast to a quartz watch, which is powered by electricity rather than a mainspring.

Turning to the specific details of the item in question, it features the following specifications: a stainless steel case with a black nylon strap, a 42 mm diameter and 12 mm thickness, a water resistance of 100 meters, a screw-down transparent case back, and a Hardlex mineral crystal for durability. The movement is a Japan-made 23-jewel automatic self-winding mechanism (Caliber 7S36), with a day/date display that offers an Arabic numeral option, as well as luminous hands and markers. The item's width is 9.4 centimeters, and the clasp type is a buckle.

In summary, this SEIKO 5 watch embodies the brand's core principles of automatic winding, water resistance, shock resistance, date display, and day display, while also showcasing a range of desirable features such as a stainless steel case, a durable crystal, and a reliable Japanese-made movement. Its specifications and attributes make it a compelling option for those seeking a well-rounded automatic timepiece.

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