18K Rose Gold Vintage Longines Conquest Watch Case
Watch Case · Rose Gold (Pink Gold) alloyed with copper for the distinct warm hue
Purity: 18K/750 (75.0% solid gold)
Type
Watch Case
Purity
18K/750 (75.0% solid gold)
Gold Type
Rose Gold (Pink Gold) alloyed with copper for the distinct warm hue
Weight
15.0 - 20.0 grams (estimate for the gold case only, excluding movement)
Description
A stunning examples of Swiss horological luxury, this Mid-Century Longines features a solid 18K rose gold case. The case back is beautifully engraved with the iconic Longines crest, signifying prestige. Rose gold cases from this era are highly sought after by collectors for their warmth and rarity compared to yellow gold counterparts.
Key Features
Solid gold 'EFCo' Longines crest engraving on case back; heavy lug design; high-relief hallmark stamps.
Color & Finish
Rich rose-pink gold with a polished mirror finish on the snap-back case; visible surface patina and swirl scratches from age.
Hallmarks & Stamps
Engraved 'LONGINES' with central crest on the case back; visible 18K/0.750 purity marks and Helvetia (Swiss assay) head hallmarks near the lugs and serial numbers.
Dimensions Estimate
34mm - 36mm case diameter with 18mm lug width; standard men's dress watch size for the era.
Gemstones & Inlays
None visible on the exterior; interior likely contains functional ruby jewels for the movement.
Clasp & Closure
Snap-back case closure with a fluted winding crown at the 3 o'clock position.
Chain & Links
Integrated tapered lugs for a leather strap or gold bracelet attachment; smooth, rounded case profile.
Craftsmanship Details
Die-struck case back with hand-finished polishing; precision-engineered snap-fit tolerances standard for high-end Swiss horology.
Authentication Indicators
Characteristic Swiss 750 hallmarks; precise, deep crest engraving; consistent color in worn areas (not plated); correct serial number placement.
Origin & Maker
Switzerland; Manufactured by Longines Watch Co.
Era & Period
Mid-Century Modern (1950-1965)
Age Estimate
circa 1955-1960 based on case geometry and engraving style.
Cultural Significance
Represents the post-WWII 'Golden Age' of Swiss watchmaking where luxury materials like 18K gold met high-precision mechanical engineering.
Condition Notes
Good vintage condition; contains light scuffing and micro-scratches typical of a 60-year-old timepiece. No major dents or thinning of the gold structure.
Value Estimate
$1,800 - $3,500 USD (Market value varies significantly based on the internal movement condition and dial rarity; gold melt value is approximately $900-$1,100).
Care & Maintenance
Clean only with a soft microfiber cloth; avoid ultrasonic cleaners which may damage the movement seals; keep away from household chemicals like bleach.
Similar Items
Vintage Omega Seamaster 18K, Patek Philippe Calatrava, or Rolex Precision in rose gold.
Interesting Facts
Longines is one of the oldest registered watch trademarks in the world, and their rose gold watches were frequently given as executive gifts in the 1950s.