Remington Rolling Block, 20 ga. single shot shotgun.  Serial #1522.  Good condition.  32” barrel has fair bore with light pitting throughout.  40% original finish with fixed rifle sights added.  Receiver and trigger guard have 40% original finish, turning patina.  Breech block and hammer have been polished bright with heavy corrosion underneath, levers coarsely checkered.  Stock and forearm have been re-finished.  Buffalo medallion inletted into left side of stock.  Action works fine – good candidate for re-barreling.  Antique, can ship to your door.