Free Shipping on U.S. Orders $99+!

Shop the Top Deals of the Week Shop Now

Connie Mack Philadelphia Athletics Signed Hand Written Letter BAS A31889 Auto 10

$509

⭑⭑⭑⭑⭑ 4.8/5 Stars from Real Collectors

Free Shipping on U.S. Orders $99+

After payment is received, items will generally ship from Pristine Marketplace or our approved vendors within 2 business days.

Orders will ship via FedEx, UPS, or USPS for both domestic and international shipments.

60-Day Risk-Free Returns

Shop with total confidence. If you're not completely satisfied, return your item within 60 days for a full refund—no questions asked. Your satisfaction is 100% guaranteed.

100% Authenticity Guaranteed

All signatures sold on Pristine Marketplace are 100% guaranteed authentic, offering buyers complete confidence in every purchase.

Each autographed item undergoes rigorous verification through trusted authentication providers—including Beckett Authentication Services (BAS), James Spence Authentication (JSA), Fanatics Authentic, or Pristine Auction’s own in-house standard, Pristine Authentic.

This unwavering commitment to authenticity protects collectors and fans alike, making every signed piece not just a display item, but a trusted investment.

Learn more

Fast & Secure Checkout

  • Amazon
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Venmo
  • Visa

Own a rare piece of baseball history with this Connie Mack signed, handwritten letter—a true treasure for collectors and fans of the game. Connie Mack, the legendary Hall of Fame manager who led the Philadelphia Athletics for five decades, personally wrote and signed this letter, making it a unique addition to any sports memorabilia collection. Authenticated by Beckett Authentication Services, this letter carries a perfect autograph grade of 10 and includes a Beckett hologram and Letter of Authenticity.

  • Handwritten and signed by legendary manager Connie Mack
  • Authenticated by Beckett with a perfect autograph grade of 10
  • Includes a Beckett hologram and Letter of Authenticity (LOA)
  • A must-have collectible for baseball historians and memorabilia enthusiasts

This one-of-a-kind signed letter is more than just an autograph—it's a piece of baseball's golden era, connecting you to one of the sport's most influential figures. Don’t miss the opportunity to add this historically significant Connie Mack letter to your collection today!