Vintage National Lock Co. Cabinet or Flat Key #123-T-7
National Lock Co. (Rockford, Illinois) · Collectibles & Antiques > Tools & Hardware > Keys
Era / Decade
Early to mid-20th Century (1920s-1950s)
Material
Steel or iron alloy with a thin nickel or zinc plating that has worn away to reveal oxidation.
Condition
Fair to Good. Significant surface rust and patina are visible, particularly on the lower blade. The stamping remains legible.
Demand Level
Niche to Moderate. Specific demand from hardware collectors or craft users (jewelry/assemblage art).
Resale Value
Estimated Resale Value
$5.00 - $12.00 plus shipping.
Estimated Retail Value
$0.50 - $1.00 (original value); Modern replacements for similar locks cost $5-$10.
Comparable Sales
Single vintage flat keys typically sell for $4-$8 plus shipping on eBay. Rare codes or brands like Yale or Corbin can reach $15, but National is very common.
Description
Authentic vintage National Lock Co. flat key, originating from Rockford, Illinois. This key features the stamped code 123-T-7. It has a classic clover-style bow with clear embossed text. Measures approximately 2-3 inches in length. Perfect for collectors of Illinois industrial history or as a decorative steampunk accessory.
Key Features
Identifiable maker (Rockford, IL was a major hardware hub); specific model/cut code stamped; authentic vintage patina; high demand for 'junk drawer' keys in the crafting/jewelry market.
Authenticity Indicators
Clear 'Rockford' and 'National' embossed stamps in period-accurate typography; age-appropriate oxidation. Confidence: High.
Flaws to Note
Heavy surface rust and corrosion; likely not functional for a lock without cleaning; slight rounding of the teeth from usage.
Selling Guide
Where to Sell
eBay is the best choice for specific key codes; Etsy is preferred if selling as a 'vintage supply' or 'steampunk charm'.
Selling Tips
Use keywords like 'Steampunk', 'Industrial Decor', and 'Rockford IL History'. Shipping is easy via a padded envelope; keep shipping costs low to encourage purchase. Do not attempt to scrub the rust off with harsh chemicals, as many buyers prefer the 'crusty' vintage look.