Nice cachets and great franking. First day cover for # C18 issued for the century of progress flight. Please contact me at: azteccollectables at hotmail.Check out my other online auctions of rare and vintage stamps. My e bay store, Aztec Collectables, has a fine and growing selection of unique covers, stamps and postcards. This item is in the category "Stamps\United States\Covers\Postal History". The seller is "aztec-collectables" and is located in this country: US. This item can be shipped worldwide.