*1930 Bobby Jones Cap with Real U.S. 1930 Buffalo Nickel

When Bobby Jones won The Open Championship, the U.S. Open, the U.S. Amateur, and the Amateur Championship in 1930, the press struggled with what to call this achievement that no one thought possible. O.B. Keeler used a bridge term, “The Grand Slam.” According to George Trevor of the New York Sun, Jones “stormed the impregnable quadrilateral of golf.” Keeler later wrote, “This victory, the fourth major title in the same season and in the space of four months, had now and for all time entrenched Bobby Jones safely within the ‘Impregnable Quadrilateral of Golf,’ that granite fortress that he alone could take by escalade, and that others may attack in vain, forever.”

Commemorating Bobby Jones Impregnable Quadrilateral this 100% cotton cap has a genuine 1930 Buffalo Nickel, soft fabric strap, "Impregnable Quadrilateral" and Bobby Jones signature and four leaf clover (which represents Bobby Jones birth date on St. Patrick's Day in 1902) in customized embroidery on the side and back of the cap.

All orders are carefully packaged to protect both the vintage coins and premium materials during transit. Standard shipping typically delivers within 5–7 business days.

You’ll receive tracking information as soon as your order ships, so you can follow its journey to your door.

To look after vintage coins and leather products, always handle coins by the edges with clean hands, avoid harsh cleaning (just dust gently with a soft cloth), and keep them away from moisture and direct sunlight to preserve their patina.

For leather, condition it every few months, wipe with a damp cloth for light cleaning, and let it dry naturally if it gets wet — never with heat. Store leather in a cool, dry place away from sunlight, ideally in a breathable bag. With these simple steps, your piece will stay beautiful and meaningful for generations.