9K Yellow Gold Swiss Watch Movement by Harley with 6 Jewels
Watch (Movement Component / Quartz Movement Plate) · Yellow Gold alloy, typical of watch components containing copper and silver
Purity: 9K / 375 fineness, indicating 37.5% pure gold content
Type
Watch (Movement Component / Quartz Movement Plate)
Purity
9K / 375 fineness, indicating 37.5% pure gold content
Gold Type
Yellow Gold alloy, typical of watch components containing copper and silver
Weight
Fractional gram weight for the visible gilt brass or gold-plated/solid movement bridge component
Description
A close-up view of a Swiss quartz watch movement bridge manufactured by Harley. The component is stamped with 375 indicating 9K gold content and features visible synthetic ruby jewel bearings, unadjusted calibration markings, and distinct cursive Harley branding.
Key Features
Clearly stamped 375 purity mark, Swiss unadjusted designation, 6 jewel count, and signature Harley cursive script on a gold-toned movement plate
Color & Finish
Warm yellow gold tone with a smooth gilt satin finish and engraved black-filled lettering
Hallmarks & Stamps
Engraved text reading 'SIX 6 JEWELS', 'UNADJ.', 'SWISS', the number '375' indicating 9K gold fineness, and the maker signature 'Harley'
Dimensions Estimate
Microscopic scale, sub-centimeter movement bridge component
Gemstones & Inlays
Six synthetic ruby bearing jewels functioning as low-friction pivot bearings for the gear train
Clasp & Closure
Secured via tiny miniature slotted screws attaching the bridge to the mainplate
Chain & Links
Not applicable as this is a watch movement component
Craftsmanship Details
Precision machining with drilled jewel holes, fine threading for miniature screws, and crisp pantograph engraving
Authentication Indicators
Precise typography, standard Swiss movement nomenclature, and consistent depth of stamped markings
Origin & Maker
Swiss manufacture by Harley (Ronda subsidiary specializing in quartz movements)
Era & Period
Late 20th century quartz watch era (circa 1970s-1990s)
Age Estimate
Estimated production date circa 1980s to 1990s based on electronic quartz movement styling
Cultural Significance
Represents the Swiss watchmaking industry's adaptation during the quartz crisis, utilizing cost-effective yet precise electronic movements
Condition Notes
Good vintage condition with clean surfaces, intact jewel settings, and clear, legible engravings
Value Estimate
Nominal melt value due to microscopic gold weight, valued primarily as a horological replacement part or collector movement
Care & Maintenance
Requires professional watchmaker handling; keep away from moisture and magnetic fields to preserve the internal quartz mechanism
Similar Items
Other Swiss quartz movements from Ronda, ETA, or ISA with varying jewel counts and plating finishes
Interesting Facts
Harley movements were produced by Ronda, a major Swiss watch movement manufacturer that supplied reliable quartz calibers to various watch brands during the quartz revolution