Vintage Unitrade NEC Stainless Steel Back Watch Case
Watch Case (Head Only) · N/A - The item is a base metal alloy with a stainless steel back as indicated by the 'STAINLESS STEEL BACK' stamp.
Purity: Non-gold; Base metal with stainless steel components
Type
Watch Case (Head Only)
Purity
Non-gold; Base metal with stainless steel components
Gold Type
N/A - The item is a base metal alloy with a stainless steel back as indicated by the 'STAINLESS STEEL BACK' stamp.
Weight
35-50 grams including internal movement (if present)
Description
A utilitarian vintage watch head featuring a stainless steel caseback. The back is stamped with technical specifications common in mid-century horology, including shock and magnetic resistance. The case shows significant wear, with the plating or base metal exhibiting heavy oxidation and pitting.
Key Features
Technical stamps for shock and magnetic resistance; 'NEC' and 'Unitrade' branding; 'Design in U.S.A.' designation.
Color & Finish
Silver-toned metallic finish with high-polish circular brushing on the caseback and a heavily pitted/corroded finish on the case body.
Hallmarks & Stamps
STAINLESS STEEL BACK, DUST PROOF, ANTI-MAGNETIC, SHOCK RESISTANCE, DESIGN IN U.S.A., UNITRADE, NEC.
Dimensions Estimate
Approx. 35mm-38mm diameter; Standard men's/unisex vintage size.
Gemstones & Inlays
None visible; Tool marks and case screws present on the perimeter.
Clasp & Closure
Screw-down or snap-down caseback (indicators suggest circular pressure fit/screws).
Chain & Links
N/A; Watch lugs are visible for strap attachment.
Craftsmanship Details
Machine-stamped caseback with cast base-metal case. Functional, industrial-grade assembly for consumer market.
Authentication Indicators
Stamps are consistent with mass-produced mid-market vintage watches. Note: Use of 'STAINLESS STEEL BACK' explicitly means the main case is NOT solid gold or stainless steel, but likely chrome-plated brass or zinc.
Origin & Maker
Unitrade (Manufacturer); Likely Japanese or Hong Kong movement/case based on era branding trends; 'Design in U.S.A.' mark.
Era & Period
Mid-Century Modern to late 20th century (circa 1960s-1980s).
Age Estimate
40-60 years old based on 'Dust Proof' terminology and pitting levels.
Cultural Significance
Represents the era of 'tool watches' and the democratization of mechanical or early quartz timepieces in the mid-20th century.
Condition Notes
Poor condition. The case shows extreme pitting, oxidation, and scratches. Structural metal loss is visible on the lugs and outer case.
Value Estimate
Minimal ($5 - $20 USD); Value is primarily in parts or horological interest rather than precious metal content, which is zero.
Care & Maintenance
Keep dry to prevent further corrosion of the base metal. Do not use chemical cleaners that may further strip remaining plating.
Similar Items
Timex, Elgin, or Seiko watches of similar vintage with chrome-plated cases and steel backs.
Interesting Facts
The term 'Dust Proof' was a precursor to modern water resistance ratings and is rarely found on watches produced after the 1980s.