Vintage 1970s Seiko KING QUARTZ 5856-8080 Analog Watch, SGO Gold Case/Band, Silver Face, New Battery replaced. Suwa Seikosha, Steel, Good Condition King Quartz 5856-8080 is one of first stage models of a luxury quartz watch series developed by Seiko Suwa諏訪 Seikosha 精工舎in the 1970s, a masterpiece that combines precision, design, and presence, symbolizing the technological prowess of the time. 4823‑8000 King Quartz is a classic 1970s dress watch that embodies Seiko’s mastery of early quartz technology. Powered by Caliber 4823, this King Quartz delivers reliable performance with an accuracy of ±10 seconds per month, a remarkable level of precision for its era and still appreciated by collectors today. The 4823 caliber is a high-grade quartz movement made by Seiko during the "golden age of luxury quartz" in the 1970s. It is part of the "luxury quartz line" that took over from King Seiko, making it a very important series in the history of Japanese quartz watches. The 4823-8000 (manufactured in 1975) is right in the middle of that early generation, making it a watch from a critical period in technological history. The iconic 1970s Design shows that a refined case with clean lines and elegant proportions (approx. 37 mm) that wear beautifully as a vintage every day or dress piece. Durable Cal. 4823 Movement has a high-grade quartz engine built for longevity and vintage reliability, with day/date functionality and practical real-world precision. As collectible heritage of part of Seiko’s ‘King’ quartz hierarchy — historically positioned as a premium choice below the Grand Quartz models — offering excellent value for collectors and vintage enthusiasts. Its versatile aesthetics are clean dial and classic case give a timeless character that suits many styles, from business to casual. This model is ideal for collectors of vintage Seiko watches, fans of Japanese horology, and purchasers seeking a historic quartz watch with real pedigree. This model features a classic design, exuding the dignity and elegant characteristic of Seiko at the time. This is a watch that embodies the charm of vintage timepieces. The King Quartz was not simply a high-precision timepiece; it may have been a "quiet revolution" that shaped Seiko's future. It features a characteristically linear and refined case design, and the dial is simple yet elegant. This model, with its metal bezel finish and lug shape subtly different from other models, is known among collectors as a "hidden gem." The historical background of Seiko's caliber 4823 is that it was a high-precision quartz movement introduced around 1975, particularly in the "King Quartz" series. In the late 1970s, Seiko focused on improving the precision of quartz technology, starting with the world's first quartz wristwatch, the "Astron"（1969）. The "King Quartz" series was positioned as a luxury line second only to Grand Seiko and was developed with the aim of combining practicality and precision. Detail features: ■Brand Design: King Quartz a simple and elegant impression and design, good for both formal and business occasions. ■Model No 5856-8080 ■ Product Number:870676 Manufactured July 1978: Seiko serial numbers are six digits long, with the first two digits indicating the year and month of manufacture. The first number（8）indicates the eighth year of the 1970s, meaning the watch was manufactured in 1978. The next letter （7） is the month code. For Seiko, 1-9 represents January through September, O = October, N = November, and D = December. → "N" is November. Therefore, this watch was manufactured in July 1978 ■Movement Features：Caliber Seiko caliber 5856 is a high-grade analog quartz (Battery-Powered) watch movement. Production was in the 1970s. This caliver boasted exceptional accuracy of ±10seconds per month a feat unmatched at the time and led to the development of even higher-end quartz models such as the Grand Quartz and Corredor. This precision and reliability laid the foundation for Seiko to become a leader in the global quartz market. The King Quartz case design was characterized by its linear, edgy form. • Sub-brands:King Quartz • Accuracy:±10 seconds/month • Display: Analog (Hour, Minute, Second, Date, Day of the Week) • Hacking Function: Yes （Secondhand Stop） • Frequency:32,768Hz （Standard Quartz） • Jewels:6 • Size: Diameter 25.6mm / Thickness 4.8mm • Manufacturer: Suwa Seikosha （now Seiko Epson） • Battery Model Number:SR1120SW/ 381 （Silver oxide） New battery was replaced December 15th 2025 ■Materials: • Case: Stainless Steel • Case Back: Stainless steel • Dial: Silver white color face with pencil-shaped hands and bar indexes combined for both legibility and elegance. three hands display • Size:37mmexcluding crown X 42mm including case lug Thickness: 12mm • Water Resistant: classified as water resistance for everyday use • Total Weight:84.1gms • Diashock: Seiko's unique shock-resistant device that protects the balance wheel from shocks, dramatically improving the accuracy and durability of watches. It is one of Seiko's core technologies, first introduced in Marvel in 1956 and still used in current models such as Presage. • Band: SGP Gold Seiko Original Brand St.-Steek Band 20cm maximum length with less adjustable band hook • Crystal: Sapphire Crystal ■Guide to set day/date/time: • Pull the notch out first position to rotate clockwise for a change of date then turn counterclockwise for a change of Weekday • Pull the notch out second position to rotate clockwise to change for correct hour minute and second. Hacking device shows to stop at 10 seconds position when the notch is pulled out. ■Condition: There are very few scratches on the case, case back, and band due to use and the sapphire crystal has no scratches visible to the naked eyes. The watch is in excellent condition overall. The battery was replaced in mid-December of this year, and it was functioning normally at the time of listing, so it should continue to function without any issues. Please be sure you are satisfied with the condition before bidding, so please check the photos and product description and ask any questions you may have (please note, however, that we may not be able to answer questions close to the end of the auction)