Richard Feynman Matted Mint Condition 1st Day Cover Richard Feynman Photo and Postal Stamp Genuine, collectible double matted Richard Feynman 1st Day Cover Mint condition 1st Day Cover stuffed and mounted with removable, acid free material Richard Feynman photo cachet with caption below; C of A and Commentary included White cardboard backing; packaged in crystal clear bag; will fit 8x10 PICTURE frame Collectible, affordable Richard Feynman wall decor