1978s Vintage Seiko KING QUARTZ 5856-7030 Analog Watch SGP Gold Case Matching Gold Elastic Band Suwa Seikosha Good Condition KQ228 Seiko King Quartz 5856-7030— A Key Reference in Japan’s High-Grade Quartz Era For collectors of vintage Seiko, the 5856-7030 represents one of the most refined executions of late-1970s high-accuracy quartz engineering. This model 5856-7030 is one of the more desirable late-1970s King Quartz references because it combines Seiko's high-grade quartz engineering with the classic gold-plated dress-watch aesthetic of the era. It was produced by the Daini factory. Powered by the Caliber 5856, this model delivers the original ±10 seconds/month performance that helped define the prestige quartz segment created by 諏訪精工舎Suwa Seikosha. Its clean case geometry, crisp dial layout, and integrated day-date display reflect the design language of Seiko’s premium quartz lines—sitting just below Grand Quartz and alongside early Twin Quartz developments. Proportions of the dial is exceptionally balanced with long applied baton markers. thin black hands. minimal text. And Day-date window integrated without overwhelming the dial. Color Harmony by warm ivory/champagne dial, gold-tone case and gold integrated bracelet has a cohesive monochromatic elegant appearance. A true collector’s watch: technically advanced, beautifully finished, and emblematic of Seiko’s pursuit of precision during the golden age of Japanese quartz innovation, a masterpiece that combines precision, design, and presence, symbolizing the technological prowess of the time. King Quartz History: Background: In 1969, Seiko released the world's first commercially available quartz wristwatch, the Astron, causing a "quartz shock" in the watch industry. Subsequently, King Quartz was introduced as a line offering even greater precision and luxury. As the development in the 1970s Seiko introduced three pillars: Grand Seiko (high-end), King Seiko (high-end mechanical), and King Quartz (high-end quartz), utilizing quartz technology, it achieved incredible accuracy of within a few seconds per day. The King Quartz series is an iconic example of Seiko's refinement of quartz technology into luxury timepieces. It debuted in the 1970s, following the trend of innovation that followed the Astron in 1969. Combining high precision, luxury, and presence, it remains highly valued in the antique market. In other words, the King Quartz series embodies the "golden age of domestic quartz" and is essential for understanding Seiko's technological prowess and design philosophy. The “5856” series in particular boasted a monthly accuracy of ±10seconds and is popular among collectors for its 諏訪精工舎Suwa Seikosha manufacturing. 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 gold 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 5856 is that it was a high-precision quartz movement introduced around 1970’s ■Brand Design: King Quartz a simple and elegant impression and design, good for both formal and business occasions. ■Model No5856-7030 ■Product Number：850995 Manufactured May 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 （5） 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 May 1978. ■Movement Features：Seiko caliber 5856 is a high grade analog quartz watch movement. Production was in the 1970s, and it 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 Credor. 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 • Battery:SR1120SW / 381 （Silver oxide） New battery was replaced September 15th,2025 • Accuracy:±10 seconds/month • Day / date:Day + date • Number of jewels:6 • Development division:Daini (Kameido, Tokyo, Japan) • Notes:The same as cal. 5855 but with a day display （as well as date）. • Display: Analog (Hour, Minute, Second, Date, Day of the Week) • Hacking Function: Yes （Secondhand Stop） • Frequency:32,768Hz （Standard Quartz） • Jewels:5 • Size: Diameter 25.6mm / Thickness 4.8mm • Manufacturer: Suwa Seikosha （now Seiko Epson） ■Materials: • Case: Stainless Steel • Case Back: Stainless steel SGP Back • Dial: Gold case and pale gold fine-mesh face with pencil-shaped hands and bar indexes combined for both legibility and elegance. three hands display • Size:35mmexcluding crown X 40mm including case lug Thickness: 8mm • Water Resistant: classified as water resistance for everyday use • Total Weight:60.9gms • Band: Matching gold color metal elastic brand with 17cm relaxed 26cm stretched circumference wrist length • Crystal: Sapphire Crystal ■Operation and Use • Time Setting: Pull the crown out one notch to rotate clockwise to adjust Date, rotate crown counterclockwise for Weekday • Time Setting: Pull the crown out two notches to rotate clockwise to adjust time-hours/minute/second（Hacking works） • Fast-forwarding the date and day of the week between 9:00 PM and 2:00 AM may cause malfunctions, so it is recommended to avoid operation in such hours ■Condition: Overall: The watch is in good pre-owned vintage condition and is currently in excellent working order after new battery was replaced on September 15th 2025. Case/Metal Band: There are very few scratches and signs of wear consistent with normal use over time. It shows very minor stains and surface micro-scuffs, and signs of wear. Dial & Crystal: The dial remains in excellent, clean condition, well preserved with clear printing, applied indices, and an attractive texture. The crystal shows some minor micro-wear upon close inspection. 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)