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Mike Piazza Un-Signed Hall Of Fame Gateway Stamp Cachet Envelope

Phil Humber Perfect Game Un-Autographed Gateway Stamp Envelope - Chicago White Sox vs Seattle Mariners

2015 World Series KC Royals Set of 5 Gateway Stamp Envelopes w/ Autograph Options

2015 World Series New York Mets Set of 5 Gateway Stamp Envelopes w/ Autograph Options

Mike Piazza Un-Autographed Post 9/11 In New York Gateway Stamp Envelope - New York Mets

Rickey Henderson Autographed Hall Of Fame Gateway Stamp Cachet Envelope

Nolan Ryan Hall Of Fame - Autographed Gateway Stamp Cachet Envelope

Nolan Ryan JSA Autographed 5th No Hitter Gateway Stamp Commemorative Cachet Envelope

Orel Hershiser & Frank Viola Autographed Cy Young Matchup Gateway Stamp Commemorative Cachet Envelope

Nolan Ryan Autographed 5,714 Career Strikeouts Gateway Stamp Commemorative Cachet Envelope

Nolan Ryan Autographed Career Strikeout Record Gateway Stamp Commemorative Cachet Envelope

Nolan Ryan Autographed 4,000 Strikeouts Gateway Stamp Commemorative Cachet Envelope

Kevin Mitchell Autographed 1989 All Star Game Gateway Stamp Commemorative Cachet Envelope

Rusty Staub Autographed Career Reflections Gateway Stamp Cachet Envelope

Rusty Staub Autographed 100 Pinch Hits Gateway Stamp Cachet Envelope

Rusty Staub Autographed Thanks Rusty Day Gateway Stamp Cachet Envelope

Mike Piazza Autographed 2000 World Series Game 2 Gateway Stamp Cachet Envelope

3,000 Hits Club Signed by Hank Aaron, Willie Mays, Carl Yastrzemski, Stan Musial, Lou Brock, Al Kaline, Pete Rose, Robin Yount, Eddie Murray, and Dave Winfield Gateway Stamp Envelope

3,000 Hits Club Signed by Willie Mays, Carl Yastrzemski, Stan Musial, Lou Brock, Al Kaline, Pete Rose, Robin Yount, Eddie Murray, and Dave Winfield Gateway Stamp Envelope

3,000 Hits Club Signed by Carl Yastrzemski, Stan Musial, Lou Brock, Al Kaline, Pete Rose, Eddie Murray, and Dave Winfield Gateway Stamp Envelope

Ron Hunt Shea Stadium 25th Anniversary Autographed Gateway Stamp Envelope