4,200 Type I Gwyn & Campbell "Union Carbines" were manufactured circa 1863-64, also known as "Grapevine Carbines." Gwyn & Campbell carbines were issued to a number of Union cavalry units primarily from the Midwest and West. Manufactured by Edward Gwyn and Abner C. Campbell, the Gwyn & Campbell was the successor to the Cosmopolitan carbine, and manufactured in the same factory out of Hamilton, Ohio. The Type I variation of the Gwyn & Campbell is distinguished by its long serpentine shaped hammer and loading lever. This example has the longer 900 yard folding ladder rear sight. It also has a blade front sight with pyramidal base, left side sling ring mount, and standard markings. Matching serial numbers underneath the breech end of the barrel, frame, and breech block.

Very good plus, retaining 40% thinning original blue finish on the barrel with mottled brown patina, and some light scratches. 20% case colors on the frame with some light freckling. 40% case colors on the lock, breech block and upper tang, with the hammer and lever turned to a brown patina. Wood is very good as lightly sanded and re-oiled with a slightly oversized buttplate, some light handling marks, and a small repaired section on the lower right below the lock. Mechanically very good.