EDMUND HILLARY & TENZING NORGAY SIGNED FIRST DAY COVER ENVELOPE EVEREST: From the original 1996, Early American Numismatic Auctions catalog: ''Tenzing Norgay & Edmund Hillary, Conquerors of Mt. Everest. Postal Numismatic Cover (PNC), Signed, ''Tenzing Norgay'' and ''Edmund Hillary'', commemorating the 25th Anniversary of the first ascent of MT. Everest, postmarked May 29th, 1978, with silver Franklin Mint coin, as made. Posted with Nepalese stamps. Housed in an attractive blue vinyl holder.'' Holders measures 5 1/4'' x 8 3/4''.