Decoding Key Markings: A Key Identification Guide

Antique keys are far more than just functional objects; they’re miniature historical artifacts, often whispering tales of the hands that crafted them and the locks they secured. A crucial element in understanding a key's story lies in deciphering the markings etched onto its surface. This guide will equip you with the knowledge to decode these markings, significantly aiding in key identification and appreciating their historical context.

The Importance of Key Markings

Markings on antique keys serve multiple purposes. They can indicate the key's manufacturer, the date it was produced, patent information, and even the intended lock type. While some markings are clear and legible, others are worn, faint, or obscured by years of use and oxidation. Careful observation and a bit of detective work are often required.

Worn antique key with faint markings

Common Types of Key Markings

Decoding Patent Dates

Patent dates are often expressed in the format “Patent Applied For” (PAFOR), “Patent No. #####,” or simply the patent number. A key with a PAFOR marking suggests the design was submitted for a patent, but not yet granted. A “Patent No.” mark signifies that the design was officially patented.

Tips for Identifying Maker's Marks

Collection of antique keys showing markings

Key Terminology Glossary

Advanced Identification

Sometimes, identifying a key goes beyond just the maker's mark. Consider the key's materials (brass, iron, steel), its overall design, and its condition. These factors can provide further clues to its origin and age. The shape of the bow and the complexity of the bit's design can also offer valuable insights.

Detailed view of a mortise key

Conclusion

Decoding key markings is a fascinating and rewarding pursuit for antique key enthusiasts. While it can be challenging, the knowledge gained provides a deeper understanding and appreciation for these historical objects. Keep investigating, keep collecting, and keep uncovering the stories held within these miniature masterpieces.