Vintage Silca Brass Mortice Key - Gold Tone Utility Blank
Key (Mortice / Skeleton Key Type) · N/A - Brass Alloy (Yellow Gold Tone)
Purity: 0K / Non-Gold. This item is composed of brass (a copper-zinc alloy) that mimics the appearance of gold but contains no precious metal content.
Type
Key (Mortice / Skeleton Key Type)
Purity
0K / Non-Gold. This item is composed of brass (a copper-zinc alloy) that mimics the appearance of gold but contains no precious metal content.
Gold Type
N/A - Brass Alloy (Yellow Gold Tone)
Weight
25-35 grams
Description
A utilitarian brass key blank designed for mortice locks. While its brass composition gives it a yellow metallic hue, it is an industrial object designed for security and function rather than jewelry or investment. The trapezoidal head features the prominent Silca brand stamp.
Key Features
Trapezoidal bow design, cylindrical shaft, and a three-notched bit for a lever lock system.
Color & Finish
Dull mustard yellow with a matte, oxidized patina. The surface shows industrial extrusion marks and significant darkening (toning) consistent with aged brass rather than gold.
Hallmarks & Stamps
Stamped 'SILCA' on the bow (head). No purity hallmarks (like 14K or 750) are present, which is standard for utilitarian hardware.
Dimensions Estimate
Approximately 75mm - 90mm in length; bit width approximately 10-12mm.
Gemstones & Inlays
None
Clasp & Closure
None
Chain & Links
Solid cylindrical shank with a standard mortice bit and a trapezoidal bow.
Craftsmanship Details
Industrial die-cast or forged brass; features machine-stamped branding and standard locksmithing tolerances.
Authentication Indicators
Red Flags for Gold: The SILCA brand is a locksmith hardware company, not a jeweler. The oxidation patterns (tarnish) and lack of purity stamps indicate a base metal composition. A magnet test would likely be negative (as brass is non-magnetic), but an acid test would confirm a base metal reaction.
Origin & Maker
Italy; manufactured by Silca (Società Italiana Lavorazione Chiavi e Affini), a leading global manufacturer of key blanks.
Era & Period
Late 20th Century (Contemporary Industrial)
Age Estimate
Likely manufactured between 1980 and 2000.
Cultural Significance
Keys symbolize security and access; brass has been the standard for durable, low-friction lock components since the industrial revolution.
Condition Notes
Fair to Good. Shows surface oxidation, minor scuffs, and dirt accumulation. The brass has developed a heavy patina that lacks the unchanging luster of high-karat gold.
Value Estimate
Non-precious / Nominal. Market value is approximately $2–$10 as a replacement blank or vintage hardware collectible. Its melt value is pennies based on copper/zinc scrap prices.
Care & Maintenance
Clean with a mild brass cleaner or vinegar and salt solution if restoration of shine is desired. Not subject to the same care requirements as precious metals.
Similar Items
Solid gold novelty keys (Tiffany & Co.), which would feature high-polish finishes and 14K/18K hallmarks.
Interesting Facts
Brass is often mistaken for gold due to its color, but it is much harder and lighter. Silca, the manufacturer, is based in Vittorio Veneto, Italy, and is one of the largest key blank producers in the world.