Harley 6 Jewel Quartz Movement Watch Component in Solid Gold Case
Watch · Yellow Gold with classic warm tone and polished finish
Purity: 9K/375 (approximately 37.5% pure gold content)
Type
Watch
Purity
9K/375 (approximately 37.5% pure gold content)
Gold Type
Yellow Gold with classic warm tone and polished finish
Weight
Estimated total watch case and movement weight between 15 to 30 grams depending on full assembly
Description
An intricate close-up view of the inner workings of a Swiss-made quartz watch movement signed by Harley, nestled inside a precious solid gold case. The image highlights the detailed gold-toned mainplate featuring six ruby jewel bearings, unadjusted escapement indicators, Swiss origin stamping, and the 375 hallmark denoting 9-karat gold purity. Electronic components, including the prominent MB101 1145Y integrated circuit and quartz crystal oscillator, demonstrate the fascinating convergence of traditional horological jeweling and modern microelectronics during the quartz era.
Key Features
Signatures for Harley and 375 purity directly on the movement component plate, six ruby jewel bearings, Swiss unadjusted quartz calibre construction, and visible electronic microchip architecture
Color & Finish
Rich yellow gold tone with high polish exterior housing and specialized metallic components inside
Hallmarks & Stamps
Visible inscriptions on the movement plate including "SIX 0 JEWELS", "UNADJ.", "SWISS", "375", and the "Harley" maker's brand script, alongside the integrated integrated MB101 IC chip text
Dimensions Estimate
Watch movement diameter is approximately 20mm to 25mm standard petite-to-medium ladies or dress watch calibre size
Gemstones & Inlays
Six functional ruby jewel bearings visible within the gold-toned movement bridge plate acting as low-friction pivot bearings
Clasp & Closure
Press-fit or threaded watch case back closure securing the inner electronic and mechanical movement assembly
Chain & Links
Not applicable as this is an internal watch movement component housed within a solid gold case framework
Craftsmanship Details
Precision-machined metal baseplate with a gold-tone finish, micro-soldered electronic circuits, expertly set ruby jewel bearings to reduce friction on gear pivots, and crisp, deeply stamped hallmark typography
Authentication Indicators
Clear Swiss manufacture stamps, legible 375 gold fineness mark on the movement plate, precise electronic circuitry layout, and genuine ruby jewel settings confirming high-grade Swiss watchmaking standards
Origin & Maker
Swiss manufacture featuring a Harley Ronda movement calibre
Era & Period
Late 20th Century Quartz Revolution era, circa 1970s to 1990s
Age Estimate
Circa 1980-1995 based on the integrated circuit design and typography style
Cultural Significance
Represents the technological turning point in horology when luxury watchmakers began housing precision electronic quartz movements inside precious metal cases, bridging the gap between high jewelry and reliable timekeeping
Condition Notes
Very Good vintage condition. Movement components appear clean with intact wiring, clear engravings, and sharp typography on both the plate and the electronic microchip. Standard dust accumulation normal for unsealed inspection views.
Value Estimate
Value is determined by a combination of the melt value of the 9K gold case components and the collector demand for vintage Swiss quartz movements, typically ranging from $150 to $500 depending on the complete watch model
Care & Maintenance
Keep away from moisture and extreme magnetic fields. Requires professional watchmaker servicing for battery replacement, movement cleaning, and gasket replacement to maintain water resistance in the gold case
Similar Items
Other vintage Swiss quartz movements by ETA, Ronda, or Harley housed in 9K, 14K, or 18K gold dress watch cases from luxury brands such as Omega, Tissot, and Longines
Interesting Facts
The 'quartz crisis' of the 1970s and 1980s forced traditional Swiss movement makers like Harley (Ronda) to innovate rapidly, combining battery-powered quartz accuracy with traditional jeweled bearing mechanics to compete with inexpensive electronic imports