Vintage Omega 18K Yellow Gold Watch Case Back, Ref. 8363044
Watch (Case Component) · Yellow Gold (High copper and silver alloy for structural integrity)
Purity: 18K/750 (75% pure gold), identified by the Swiss Helvetia hallmark and '750' stamp inside the shield.
Type
Watch (Case Component)
Purity
18K/750 (75% pure gold), identified by the Swiss Helvetia hallmark and '750' stamp inside the shield.
Gold Type
Yellow Gold (High copper and silver alloy for structural integrity)
Weight
4.5 - 7.5 grams (estimated weight of the back plate only, solid construction)
Description
A genuine 18-karat solid yellow gold inner case back from a vintage Omega timepiece. The interior features exquisite circular graining used to trap dust and oil, and bears the prestigious Swiss Helvetia hallmark indicating high-purity gold meeting federal Swiss export standards.
Key Features
Deeply struck Omega 'Globe' logo; Hand-engraved watchmaker's scribings indicating past servicing history; Precision-lathed inner rim.
Color & Finish
Classic rich yellow gold with a circular engine-turned (perlage) interior finish and heavy aged patina with iridescent toning.
Hallmarks & Stamps
Omega Watch Co. 'FAB. SUISSE' circular logo; 18K 0.750 purity stamp; Helvetia (Swiss assay) punch; Serial/Ref number 8363044; Hand-etched watchmaker service marks.
Dimensions Estimate
32mm - 36mm diameter (standard vintage men's dress watch size)
Gemstones & Inlays
None (Solid gold interior case component)
Clasp & Closure
Snap-back or Pressure-fit case closure mechanism
Chain & Links
N/A - Watch case back
Craftsmanship Details
Precision die-struck hallmarks; lathe-turned interior finishing; meticulously machined pressure-fit flange for water resistance.
Authentication Indicators
Correct Omega logo typography; presence of the 'Helvetia' profile (Swiss hallmark for 18K); high-quality perlage finishing; specific depth of serial engraving.
Origin & Maker
Switzerland, Omega Watch Co. (Bienne)
Era & Period
Mid-Century Modern (circa late 1940s to early 1950s) based on the serial number range and logo style.
Age Estimate
Circa 1947-1952 (Based on the 8.3 million series reference number)
Cultural Significance
Represents the post-WWII 'Golden Age' of Swiss watchmaking where gold watches were the ultimate symbol of professional success.
Condition Notes
Good; showing significant surface oxidation (tarnish) and light scratches. Structural integrity is excellent with crisp stampings.
Value Estimate
$400 - $650 (Primary value is gold melt weight, plus a 20-30% premium for the Omega brand and vintage parts market).
Care & Maintenance
Gentle cleaning with a specialized jewelry cloth; avoid ultrasonic cleaners if the movement is attached. Professional polish can restore mirror luster.
Similar Items
14K gold-filled Omega case backs (marked 'GF' or 'Gold Filled') or stainless steel versions (marked 'Acier Inoxydable').
Interesting Facts
The 'Helvetia' hallmark used on this piece was the official Swiss symbol for 18K gold from 1880 until 1995.