Metal Security Seal Value Guide

These vintage metal security seals from the 1930-1960 era represent a critical evolution in industrial tamper-evidence technology in the United States. Highly collectible for their utilitarian history, they were essential for securing utility meters and high-value shipments against interference.

What Is Metal Security Seal Worth?

The typical price range for Metal Security Seal is $10 - $15 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the seal, specifically if it remains un-crimped or in its original 'new old stock' state.
• Historical significance of the company or utility name embossed on the metal surface.
• Rarity of the specific locking design or the presence of unique serial number sequences.
• The integrity of the wire loop, as rusted or snapped wires significantly reduce the market value.

How to Identify Metal Security Seal?

• Look for embossed serial numbers or company initials stamped directly into the metal body.
• Verify the presence of the original twisted or crimped wire loop characteristic of mid-century designs.
• Check for a patina consistent with 1930-1960 era metals, such as aged lead, tin, or galvanized steel.
• Examine the locking mechanism for specific US manufacturer marks common during the early to mid-20th century.

History of Metal Security Seal

Security seals have a long history, evolving from wax and clay impressions to more robust metal and plastic designs. These types of metal wire seals became prominent in the late 19th and early 20th centuries for ensuring the integrity of shipments, utility meters, and other controlled items. They served as tamper-evident devices, providing a visual indication if an item had been opened or interfered with.