Manufactured by Edward Gwyn and Abner Campbell in Hamilton, Ohio, circa 1864. The carbine features the Type II flat hammer, short lever, buttplate with curved heel and short base folding leaf rear sight. A cavalry sling bar and ring are mounted on the left side of the receiver. The part octagon barrel has a military blue finish and the receiver, hammer, lever and buttplate are casehardened. The breechblock and tang are fiery niter blue. The stock is oil-finished black walnut. The lock plate has the "GWYN & CAMPBELL" patent markings and "1862" date behind the hammer. "UNION/RIFLE" is roll stamped on the right side of the receiver. The serial number is located on the bottom of the barrel, the receiver and the breechblock. A "PT" Ordnance inspection mark is stamped on the underside of the barrel in front of the serial number and single letter Ordnance sub-inspection marks are stamped on most components. The left side of the stock is stamped with two Ordnance inspection marks that consist of the script initials "RKW" and "WHR" with rectangular borders. A total of 4,000 Type II carbines were manufactured by Gwyn & Campbell; most of these carbines were issued to Midwestern or Western Cavalry regiments.

Excellent. The carbine appears to be unfired and shows only very light storage wear. The barrel retains more than 90% of the military blue finish. The receiver, hammer, lock plate, lever and buttplate retain 95% of the casehardened finish with strong case colors. Nearly all of the fiery niter blue finish is present on the breechblock and tang. The stock is excellent with raised feather grain, minimal handling wear and extremely crisp Ordnance inspection marks. This is an excellent example of an as-issued, Gwyn & Campbell Type II breech loading carbine.