Condition Grade: Very Good (Fine) overall, with the individual pieces ranging from well-preserved frontier-issued examples to museum-grade rarities.

Condition Assessment: The blades exhibit authentic, honest signs of historical field grinding, sharpening line variations, and expected age patina, while the turned oak grips remain structurally sound and free of major splits.

Dimensions: Each knife features a robust 8.5-inch steel spear-point blade with an overall tool length of approximately 13.5 inches.

Markings and Features: This spectacular grouping includes two early second-pattern brass variants (Serial #1483 and #4010), a scarce "U.S. 1882 SPRINGFIELD ARMORY" dated trial variant, and an exceptionally rare, first-production experimental iron-hilt variant (Serial #439).Completeness: The set is remarkably complete, with all four knives accompanied by their original, authentic 19th-century US military leather scabbards displaying varying loop and brass hook belt attachment configurations.

Historical Background: Issued during the height of the Western Indian Wars, the Model 1880 Springfield was a rugged multi-purpose entrenching tool designed for frontier soldiers, making a complete four-piece variation set of this caliber an extraordinary find for advanced militaria collectors.