The famous Seiko Chronograph Quartz watch, specifically the historic Seiko 7A28-7010 model (known as the "Speedmaster" in the Japanese market), dating back to the early 1980s (1982-1983). This watch is considered a masterpiece among watch collectors due to its unique features and historical significance: 1. Historical Features and Movement - First Analog Quartz Chronograph in the World: The watch features the Seiko 7A28 caliber, the first analog quartz chronograph movement in watchmaking history. - High-Quality and Serviceable Engineering: Unlike modern plastic quartz movements, this movement is entirely built with metal gears and contains 15 jewels, making it disassemble-able, serviceable, and adjustable to last for decades. - Four Independent Motors: Each sub-dial hand is driven by an independent stepper motor to ensure extreme accuracy. 2. Exterior Design and Structure - Case and Dial: It comes with a stainless steel case and integrated bracelet, featuring sharp edges and angles characteristic of the 1980s, and a hooded lugs design. - Size: The watch diameter is 38.5 mm (or approximately 39 mm without the crown), a classic and very comfortable size on the wrist. - Unique Button Layout: The time-setting crown is located at 8 o'clock, while the three chronograph pushers are distributed at the corners (2, 4, and 10 o'clock) to activate the different functions. Material: Stainless Steel Brand: Seiko Movement Type: Quartz Watch Size: 38mm Features: Chronograph