Spencer/Burnside, .52RF cal. repeating carbine.   Serial #17768, mfg. 1865.  Very good condition.  Popular Civil War repeating carbine. 20” 3-groove barrel has clean shiny bore, correct sights, 50% finish, turning patina.  Receiver and lever have 50% thinning blue with some surface corrosion and fine scratch marks, crisp markings.  Lock plate and hammer are very good.  Stock and forearm have very good finish with strong cartouche and letters: “S.N.” stamped on either side.  Long crack in stock.  Saddle ring present.  Stock hardware is excellent.  One of a batch sub-contracted to the Burnside Rifle Company in 1865.  A rare variant of one of the most famous Civil War firearms!   Antique, can ship to your door.