Offered is a lot of 5 Wilt Chamberlain signed Gateway Stamp Co. First Day Covers (FDCs). These FDCs are envelopes that measure 6.5x3.625" and are each signed by the NBA Hall of Famer in black ballpoint pen. These were created to commemorate the 100th Anniversary of basketball and are limited to 1,000. A silk cachet featuring Chamberlain is attached to the envelope, and each one has been postmarked, "Springfield, MA, August 28, 1991." A 29-cent USA Basketball Centennial 1991 stamp is affixed to the top right corner of each FDC. Also included is a Gateway COA for each piece.