Vintage Single Blade Bulldog Pocket Knife. 5-1/2 inches closed. 9-5/8 inches open. Made in USA. "CASE XX 5172" and "HAND MADE IN U.S.A." tang stamps. Double oval open-C "CASE" shield. Chrome vanadium blade etched "CASE XX BULLDOG" with image of a bulldog. Stag handle. Nickel Silver bolsters and brass liner. With original wooden box.