The gun in question is a New Ithaca Gun. The Crass was a hammerless gun. The NIG hammer guns were built and serial numbered right along with the Crass Model hammerless guns, and then the Lewis Model hammerless guns, and then the Minier Model hammerless guns and finally the Flues Model hammerless guns. With Twist barrels and no engraving, it is the lowest price gun, the A-Grade at the time.