COLLECTOR SUMMARY
COLLECTOR SUMMARY
A King Quartz 5855-8010 QHC804, built around one of Seiko's early high-grade quartz calibers and presented in a gold-plated case with a refined linen dial.
This reference sits at an important point in Seiko's quartz development, when engineering confidence and higher-end finishing started to come together in a more mature product.
The gold linen dial, original unpolished plating and hammered-style lug finishing give the watch a restrained but distinctive character that reads very differently from later quartz Seikos.
For collectors focused on early quartz build quality, period-correct execution and honest condition, this is a strong King Quartz example with the right visual details intact.
BUYING QUESTIONS
BUYING QUESTIONS
Originality is described as carefully and directly as possible based on what can be observed and verified. Where parts are believed to be original, replaced or uncertain, that should be stated in the listing.
Service status is only represented as stated in the listing. If a watch was serviced or checked, that should be mentioned explicitly rather than assumed.
Timing performance can vary by age, movement type and service history. Any measured rate or performance note should be understood as an observation at the time of listing, not a lifetime guarantee.
Price reflects a mix of rarity, condition, originality, reference desirability and the time spent sourcing, researching and presenting the watch accurately. Some vintage Seiko references are simply much harder to find in honest condition than others.
If you want more detail before buying, additional photos and clarification can be requested.
SPECIFICATIONS
SPECIFICATIONS
COLLECTOR NOTES
COLLECTOR NOTES
In 1977, as Seiko continued to refine its quartz technology beyond the experimental phase, the 5855-8010 was released under the King Quartz banner. This model represents a turning point in Seiko's early quartz development, where engineering confidence met restrained luxury.
The case is gold-plated, not as an afterthought, but as an integrated part of the watch's identity. It reflects Seiko's ambition at the time: to produce quartz watches with a presence equal to their mechanical counterparts. The plating is original, untouched, and preserved without polishing, offering a clear look at the manufacturing standards of the period. Please not the specially finished "gold hammered" look of the lugs.
Inside is Seiko's 5855 movement. It's from the second generation of high-grade quartz calibers, built thicker and heavier than later models, with an emphasis on long-term reliability. This movement was adjusted at the factory to maintain monthly accuracy, and its thermo-compensated design allowed it to remain stable without relying on dual-oscillator configurations.
This example features its original dial, with sharp applied markers and clean text alignment, characteristic of Seiko's higher-spec assembly lines in the late 1970s. The date at 3 o'clock changes crisply, and the hands track smoothly with no backlash. The crown remains tight, and the setting function operates without resistance.
Quartz watches from this era are often overlooked, but examples like the 5855-8010 show what was possible before cost reduction took hold. This is a precise, serviceable, and cleanly executed watch that delivers more substance than its slim successor lines. For collectors focused on build quality, original condition, and correct period execution, this model offers all three.
