9K Yellow Gold Swiss Quartz Movement Watch Movement by Harley
Watch · Yellow Gold component parts and gilded bridge plates
Purity: 9K (375 fineness, approximately 37.5% pure gold content)
Type
Watch
Purity
9K (375 fineness, approximately 37.5% pure gold content)
Gold Type
Yellow Gold component parts and gilded bridge plates
Weight
Estimated total gold-bearing watch component weight of 3-5 grams; overall watch weight dependent on case
Description
An intricate interior view of a Swiss quartz watch movement featuring components signed by Harley. The layout highlights the golden-hued bridge plates stamped with 375 gold fineness, six functional ruby jewels, an exposed copper wire electromagnetic coil, silver-oxide watch battery housing, and a black printed circuit board. This bridges traditional horological components with electronic timekeeping precision.
Key Features
Includes explicit '375' gold purity hallmark on the brass/gold alloy bridge, 'SIX 6 JEWELS' jewel count stamp, 'SWISS' origin stamp, and distinct cursive Harley signature branding
Color & Finish
Warm yellow gold tone with polished bridge finishes and exposed copper coil winding
Hallmarks & Stamps
Stamped 'SIX 6 JEWELS', 'UNADJ.', 'SWISS', '375' (indicating 9-karat gold purity), and the cursive 'Harley' maker's signature
Dimensions Estimate
Standard small watch movement scale, approximately 15mm to 25mm in diameter
Gemstones & Inlays
Six synthetic ruby pivot jewels visible on the bridge plate functioning as low-friction bearing surfaces
Clasp & Closure
Not applicable as this is an internal watch movement component
Chain & Links
Not applicable; contains micro-circuitry, electrical coil, and gear train components
Craftsmanship Details
Precision micro-machined Swiss components, gilt surface finishing on the movement bridge, cleanly stamped typography, and integrated printed circuit board architecture
Authentication Indicators
Clear Swiss regulatory and technical stamps, crisp lettering on the gilt bridge, and standard Swiss quartz module layout. Professional verification via XRF spectrometry recommended to confirm gold content of the marked components.
Origin & Maker
Switzerland, manufactured by Harley (a division of Ronda known for producing Swiss quartz watch movements)
Era & Period
Late 20th Century / Quartz Crisis Era (circa 1970s-1990s)
Age Estimate
Estimated production date circa 1980s to 1990s based on the integration of early analog quartz movement architecture and Swiss labeling
Cultural Significance
Represents the pivotal technological shift in horology during the late 20th century, where traditional precious metals were still utilized in movement components or external housings despite the shift to battery-powered quartz mechanisms
Condition Notes
Very good vintage technical condition; clean circuit tracks, intact copper coil winding with no visible breaks, and clear stampings. Untested for operational functionality.
Value Estimate
Value is primarily derived from the collector market for vintage watch parts, small-scale scrap gold melt value of the 9K components, and potential utility for watch restoration
Care & Maintenance
Keep away from moisture, extreme magnetic fields, and corrosive battery acid leaks. Service by a professional watchmaker is recommended if restoring the timepiece
Similar Items
Standard ETA quartz movements, Ronda quartz calibers, and various Swiss-made analog quartz watch movements from the late 20th century
Interesting Facts
Harley movements were produced as reliable Swiss quartz alternatives during the quartz revolution when traditional Swiss watchmakers adopted electronic movements to compete with international quartz technology