1957-D Lincoln Cent MS63RB, JS

75% red, with an interesting mark that could be an upside down D punched from the left center of the D to the tip of the 9. The top pf the 5 is filled as a marker. Let me know if you know anything about this.
Country:  United States 
Denomination:  .01 Dollar 
Date:  1957
Mint: 
Grade:  63 RB 
Metal:  Bronze 
Item #:  1702-064-56