SEIKO 5 Automatic Blue Dial Men's Watch

Product details:

• Item width: 9.4 centimeters
• Clasp type: Buckle

About this item: - Japan 23 Jewel Automatic Self Winding Movement (Calibre 7S36) - Stainless Steel Case with Black Nylon Strap - Day/Date Display with Arabic Option, Luminous Hands and Markers, Hardlex Mineral Crystal for Durability - Case Size: 42 mm Diameter, 12 mm Thickness - Water Resistant up to 100M, Screw Down Transparent Case Back

SEIKO 5 - the meaning of the "5": Back in the 1970s, a great marketer came up with the idea that for a watch to be considered a SEIKO 5, it must have the following 5 attributes (hence the name SEIKO 5): 1. Automatic 2. Water resistant 3. Shock resistant 4. Date 5. Day

It is important to note that some SEIKO 5 watches are actually SEIKO 4s, if they do not include the "Day" function, in which case the Caliber 7S25 is used. The only difference between the commonly found 7S26 and the 7S25 is the absence of the day wheel. Additionally, re-issues of SEIKO 5 Sports models often utilize the 7S36 caliber. The 7S36 is similar to the popular 7S26, but it features 23 Jewels instead of the 21 found in the 7S26. These movements beat at a rate of 21,600 bph (beats per hour) or 6 bps (beats per second).

It is worth mentioning the ETA 2824-2 beats at 28,800 bph or 8 bps, while a Miyota 82xx beats at 21,600 bph. These three movements are commonly found in around 80% of affordable automatic wristwatches. However, their market share is now facing competition from the growing popularity of inexpensive China-made automatic movements.

An automatic watch, also known as a self-winding watch, is a mechanical timepiece that is wound by the motion of the wearer's arm, eliminating the need for manual winding every day. Unlike a quartz watch that runs on electricity, a mechanical watch is powered by a mainspring that must be rewound to ensure accurate timekeeping.

product information: