Vintage Seiko King Quartz Wristwatch 9923-8060 Twin Quartz 1981

SPECIFICATION

Reference: King Quartz
Movement: Twin quartz 9923
Age: April 1981
Case Size: 36mm
Case Thickness: 9mm
Lug to Lug: 42mm
Lugs: 18mm
Condition: Used Seiko watch
Box & Papers: No
Case Material: Stainless Steel
Warranty: 12-Months Warranty

 POINTS TO MENTION

• In fantastic pre-owned condition, with light wear from use
  
• Case and bezel have some very light scratches and mark
  
• White frosted dial
• Serviced Movement
• New battery fitted
• Quartz signed crown
  
• Paired with an unworn black leather strap with deployant clasp
  

THE WATCH

The Seiko King Quartz 9923-8060 is a vintage high-grade quartz wristwatch from Seiko’s late-1970s King Quartz line up featuring day and date complication, it was introduced during the peak of the quartz revolution., it represents Seiko’s commitment to bringing advanced quartz technology and refined design to a slightly more accessible tier without compromising on performance or quality.

It is powered by Seiko’s Calibre 9923 Twin Quartz movement, which incorporates two quartz crystals alongside a temperature compensation system to enhance accuracy beyond that of standard single-crystal quartz watches. This technology allowed the 9923 to achieve impressive precision.

Today, the King Quartz 9923-8060 is valued by collectors and enthusiasts for its blend of technical innovation, dependable performance, and classic 1970s styling. While slightly more understated than its Grand Quartz counterparts, it remains a strong example of Seiko’s pioneering role in advancing high-accuracy quartz watchmaking during a transformative period in horological history.

TWIN QUARTZ

Twin Quartz is Seiko’s temperature-compensated quartz system, introduced in the late 1970s. Unlike standard quartz watches that use a single quartz crystal, Twin Quartz uses two crystals along with a specialized circuit that compares their oscillations and corrects for temperature-related timing errors. This was important because temperature changes are the main reason quartz watches drift over time, and Twin Quartz was designed to eliminate that issue.

The way Twin Quartz works is fairly clever: the two crystals are cut so that their frequency shifts in opposite directions when temperature changes. As the temperature rises, one crystal’s frequency increases while the other decreases. The circuit compares the two frequencies and adjusts the output, effectively canceling out the temperature drift. This made Twin Quartz far more accurate than typical quartz watches of the era.