The Gallager carbine was designed by Dr. Mahlon J. Gallager, a Southerner by birth, and manufactured under license by Richardson & Overman in Philadelphia where Gallager had a dental practice. Reportedly, 17,728 Gallager carbines were manufactured in three different variations. It has a notch and folding leaf rear sight (front sight absent), blued barrel and casehardened frame, lock plate marked "GALLAGER'S PATENT/JULY 17Th 1860" and "MANUFACTd BY/RICHARDSON & OVERMAN,/PHILADA." above the serial number, smooth walnut stock with patch box, saddle bar and ring.
Fine, retains strong traces of original blue finish underneath scattered heavy surface corrosion on the barrel, 75% plus vivid original case colors strongest on the lock and frame. Stock is very fine with some light dents and handling marks. Mechanically excellent. Patchbox door does not remain firmly closed, otherwise mechanically excellent. Absent front sight as mentioned above.