CHUCK YEAGER SPEED OF SOUND ACE PILOT SIGNED FIRST SUPERSONIC FLIGHT 1947 X-1 STAMP SHEET.

*** SIGNED IN BEAUTIFUL BLACK INK.

*** TWENTY BEAUTIFUL 32 CENT FIRST SUPERSONIC FLIGHT X-1 STAMPS IN GEM CONDITION.

*** SIGNATURE & SHEET OF SUPERSONIC STAMPS IN MINT CONDITION.

*** JSA AUTHENTICATION COA WITH MATCHING SERIAL NUMBER STICKER INCLUDED.