Remington Model 51 Type II, .380 cal. automatic pistol.  Serial #PA53259, mfg. 1919-1927.  Very good condition.  3 ¼” barrel has very good bore.  Slide has approx. 50% original blue with some corrosion, edge and muzzle wear.  Frame has 70% blue with corrosion at bottom.  Remington/UMC grips are very good.  Correct magazine.  Action works fine.  Beautifully made little automatics – rarely seen in .380 cal.  C&R OK.