Vintage Unitrade NEC Stainless Steel Back Watch Case
Watch Case (Head Only) · None (Likely Chrome or Nickel plated base metal with Stainless Steel back)
Purity: Non-gold; Base metal with plated or polished steel finish
Type
Watch Case (Head Only)
Purity
Non-gold; Base metal with plated or polished steel finish
Gold Type
None (Likely Chrome or Nickel plated base metal with Stainless Steel back)
Weight
25-35 grams (Total case weight including crystal and potentially movement)
Description
An industrial mid-century watch case from Unitrade NEC featuring a multi-functional case back design. The piece reflects the era's focus on durability with 'Anti-Magnetic' and 'Shock Resistance' claims. The case back features a distinctive sunburst-brushed stainless steel center surrounded by a notched ring for tool engagement.
Key Features
Six-notched locking ring, 'Design in U.S.A.' signature, and period-specific horological marketing stamps
Color & Finish
Silver-tone; Circular brushed finish on case back, high-friction pitting on lugs
Hallmarks & Stamps
STAINLESS STEEL BACK, DUSTPROOF, ANTI-MAGNETIC, SHOCK RESISTANCE, DESIGN IN U.S.A., NEC, UNITRADE
Dimensions Estimate
34mm to 36mm diameter (standard vintage men's size), 18mm lug width
Gemstones & Inlays
None
Clasp & Closure
Screw-down or friction-fit case back with six-notched peripheral locking ring
Chain & Links
N/A - Watch head only; standard integrated lugs for spring bars
Craftsmanship Details
Machine-stamped case back with industrial-grade engraving; cast base-metal housing with secondary plating process.
Authentication Indicators
The 'Stainless Steel Back' stamp is a primary indicator that the main case body is NOT gold or steel, but rather a cheaper base metal alloy. No gold hallmarks present.
Origin & Maker
Unitrade / NEC; likely U.S. design with assembly/parts from Hong Kong or Japan
Era & Period
Mid-Century Modern to late 20th Century (circa 1960s-1970s)
Age Estimate
Approximately 40-60 years old
Cultural Significance
Represents the democratization of Swiss-style watch aesthetics for the mass market during the pre-quartz and early-quartz revolution.
Condition Notes
Fair to Poor. Significant pitting and oxidation on the outer lugs and case body, indicating a base metal composition under thin plating. Heavy scratching on the steel back.
Value Estimate
Minimal ($5 - $15 USD); Value is primarily as a parts piece or for sentimental horological interest. No intrinsic precious metal value.
Care & Maintenance
Keep away from moisture as the base metal parts are corroding. Use a soft dry cloth; avoid ultrasonic cleaners which may accelerate plating loss.
Similar Items
Vintage Timex, Westclox, or Caravelle base-metal watches from the same era.
Interesting Facts
The brand 'NEC' in this context likely refers to a distributor or promotional brand rather than the electronics giant, typical of the 1970s 'private label' watch boom.