25-20 cal. The model 53 is a very popular gun. We have a hard time keeping them on the shelf. This one has most blue remaining. Thinning in some spots. Unfortunately someone has stamped in the letters “W S” on the left hand side of the receiver. Scratched in the letters “E H” on right hand side of the receiver. Other than that she is a fine looking gun. Wood, metal, action and bore are all in fine condition.