Husqvarna 1871 Rolling Block, 24 ga. single shot shotgun.  Serial #586, mfg. Sweden.  Fair condition.  37” barrel has pitting entire length, 40% finish.  Rear sight added to barrel.  Receiver, breech block and hammer have been polished bright.  Hammer and breech block crudely checkered.  Stock and forearm have been re-finished.  Rolling block action is tight.  Good candidate for re-barreling.  Antique, can ship to your door.