9K Yellow Gold Harley Quartz Movement Watch Case
Watch · Yellow Gold with classic warm tone and typical copper-silver alloy balance for 9K hardness
Purity: 9K / 375 fineness, indicating 37.5% pure gold content
Type
Watch
Purity
9K / 375 fineness, indicating 37.5% pure gold content
Gold Type
Yellow Gold with classic warm tone and typical copper-silver alloy balance for 9K hardness
Weight
Estimated total gold case and components weight around 10 to 15 grams, solid housing with internal movement components
Description
An intricate close-up view of the interior of a luxury dress watch, featuring a Swiss-made Harley quartz movement housed within a solid 9K yellow gold case. The image highlights the electronic circuit integrated with traditional watchmaking elements, including six functional ruby jewel bearings, copper wiring coils, quartz crystal oscillator, and gold-plated bridge plates bearing the '375' purity hallmark.
Key Features
Swiss Harley quartz movement, six jewel bearings, unadjusted calibration, 9K gold case with clear 375 purity stamp, integrated circuit chip labeled MB101 1145Y
Color & Finish
Rich yellow gold hue with polished interior case bezel and fine industrial metal finishing on the movement bridge
Hallmarks & Stamps
Visible markings on the movement plate include 'SIX 0 JEWELS', 'UNADJ', 'SWISS', '375', and the maker's mark 'Harley'
Dimensions Estimate
Standard dress watch case interior size, approximately 25mm to 32mm diameter housing
Gemstones & Inlays
Six functional ruby jewel bearings visible on the movement bridge for reducing friction in gear pivots
Clasp & Closure
Press-fit or threaded watch case back closure securing the quartz movement module
Chain & Links
Not applicable to watch movement module interior
Craftsmanship Details
Precision-engineered Swiss quartz movement with gold-plated circuit bridges, cleanly stamped hallmarks, and meticulously aligned electronic microcomponents
Authentication Indicators
Clear 375 hallmark stamped directly onto the movement bridge, authentic Swiss Harley cursive signature, precise electronic component layout
Origin & Maker
Swiss manufacture utilizing a Harley (Rondelle/Ronnda group) quartz movement housed in a solid 9K gold case
Era & Period
Late 20th Century quartz revolution era, circa 1980s to 1990s
Age Estimate
Circa 1980s-1990s based on standard quartz integrated circuit layouts and Harley movement branding
Cultural Significance
Represents the bridge between traditional precious metal jewelry craftsmanship and modern electronic horology, highly popular for everyday luxury dress watches in Europe and the UK
Condition Notes
Very Good vintage condition. Clean movement layout with no visible corrosion, battery compartment intact, screws and jewel settings secure.
Value Estimate
Value is derived from the melt value of the 9K gold case combined with the collectible value of the Swiss quartz watch assembly, ranging from $200 to $500 depending on total gold weight and brand
Care & Maintenance
Keep away from moisture and extreme magnetic fields, replace silver-oxide watch batteries regularly to prevent leakage, professional servicing recommended for gasket replacement
Similar Items
Other 9K or 18K gold dress watches featuring ETA, Ronda, or Harley quartz movements from Swiss manufacturers
Interesting Facts
The 'quartz crisis' of the 1970s and 1980s led traditional Swiss makers to incorporate reliable electronic movements like Harley into precious metal cases to compete with accurate Japanese quartz watches