Vintage Yale University mail piece from the Art Library Stationary History Piece

Vintage Yale University mail piece from the Art Library also features a 1967 US 5 Cent George Washington Stamp Blue - On Post - Rare Vintage *The envelope was sent from the Art Library - Yale University *Mailed to J. A. Helzer  with the mailing address to Cheyenne, WY. *James A. Helzer *Post maked July 7th 1967  from New Haven Connecticut *Envelope is in excellent vintage condition with slight marking on the left side - please see the photo *Stamp is still affixed to the envelope *Pictures are part of the description *Item in pictures is what you will receive *Please research the significance of this piece with the collectible stamp *Smoke Free Home Great Collectors Piece - Stationary from Yale University from the Art Library Envelope also features a 1967 US 5 Cent George Washington Stamp in Blue is a rare vintage find for any collector. The stamp features a block design and is affixed to a post. It is a used piece, but its quality and grade are not specified. The stamp is from the United States and features George Washington as its topic. Certification is not available for this item, but it is a unique addition to any postage or United States stamp collection. Tags unicover collection unique yale university college history founder stamps rare vintage home   collecting one of a kind postal household United States *Helzer vs. Federal Court - posted in the Washington Times 1994 *Yale University Development Board *Unicover Corp founder