A National Key Value Guide

These 1950s brass keys represent the mid-century peak of A National Key, a division of the Cole National Corporation founded in 1912. As one of the largest American key blank producers, their products are prized by collectors for their historical connection to domestic and automotive security.

What Is A National Key Worth?

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

• Condition of the brass, including the presence of original luster versus heavy oxidation or wear.
• Completeness of the set, such as having two matching keys from the same era.
• The specific lock type the key was cut for, with automotive or unique industrial blanks often carrying higher interest.
• Legibility of the manufacturer's stamps and historical logos.

How to Identify A National Key?

• Look for the 'A National Key' or 'Cole National' branding stamped directly into the brass head.
• Verify the material is solid brass, which may show a natural dark patina consistent with 1950s age.
• Check for specific keyway codes or numbers used by the company to identify home or office lock compatibility.
• Confirm the 'Made in USA' origin marking often found on authentic mid-century blanks.

History of A National Key

A National Key company, also known as Cole National Corporation, was a prominent American manufacturer of keys and related products. Founded in 1912, the company became one of the largest key blank producers in the United States, providing keys for a vast array of locks including those for homes, offices, and automobiles. Their keys are now sought after by collectors for their historical significance and craftsmanship.