MOST OF THE MIX 60s-80s. ITS A VERY NICE MIX. SOME DULPS MAY HAVE SLIPPED IN BUT OTHERWISE NO PROBLEMS. LOOKS TO BE MAYBE CLOSE TO 50-50 mix WITH ADDRESSED & UNADDRESSED COVERS.GREAT TO COLLECT TRADE AND RESALE. PLEASE VIEW MY STORE AUCTIONS. The item "1000 MIXED LOT OF 1940s-1980s US FIRST DAY COVERS UNADDRESSED & ADDRESSEED#Box8a" is in sale since Thursday, September 12, 2019. This item is in the category "Stamps\United States\Collections, Lots". The seller is "intercountydeals" and is located in Brooklyn, New York. This item can be shipped worldwide.