Verifying if a firearm’s features (like grip angle or barrel length) match its recorded production batch.

Would you like a printable one-page version or an Excel-style rarity calculator based on this chart?

High-Standard Manufacturing Company, Inc. has a long and complex history, making serial number research a fascinating but sometimes confusing aspect of collecting their firearms. Because the company changed ownership and location multiple times, tracking the manufacturing date of a specific gun requires careful attention to detail.

: Introduced July 22, 1975. The first East Hartford manufactured pistols began using this prefix around June 1977.

This guide provides an overview of High-Standard serial number data, explains how to interpret the charts, and offers tips for resolving discrepancies.