.48 caliber, 28" octagon barrel with a near excellent bore. The patent breech of this rifle is equipped with a bolster on both sides with threaded nipple sockets on each side which would service the same barrel however, the left socket is not drilled through to the bore of the barrel. The top tang which the breech fits into has flared spark deflectors on each side and the left side of the rifle has a sideplate that is the same shape as the lockplate. The left nipple socket is filled with a "blank nipple" which is slotted on top for removal with turn screw. This configuration involved a lot of extra work for reasons that are not easy to put your finger on but is found on high-quality German arms for a very short window of time. The lockplate and sideplate are uniquely shaped and the lock features a European style rotating safety mounted ahead of hammer. The lock and sideplate feature beautiful loose floral scroll with nice geometric borders. The rifle is iron mounted with the triggerguard, round patchbox, toeplate and buttplate tang all show nice loose floral scroll. The top flat of the barrel is marked "T.D. & Co. / PHIILADA", cursory research did not locate a maker by such name. The condition of the rifle is excellent with the barrel retaining about 90% original brown finish which is thinning evenly and blending with a pleasing smooth brown patina. The locks and all iron furniture shows a pleasing medium gray patina overall with metal surfaces smooth and generally free of any pitting. The stock is of nicely figured American black walnut and rates excellent with 95% original finish remaining and with sharp checkering on wrist and a nicely formed cheekpiece. Edges remain crisp, wedge escutcheons are silver ovals while the forend tip is of pewter. The rifle is sighted with a small blade front and a bold fixed rear open barrel sight. A period and likely original ramrod is present beneath barrel. This is a very intriguing rifle which exhibits the quality we expect to see on a Philadelphia made gun.