This is a First Day Cover of Scott numbers UY18a. Issued on March 15, 1967, the cover is in mint condition. Any Rainbow effect you may see in the picture is from the protective plastic over the stamp. These stamps were brought to you by TSS Stamp & Coin out of Long Island, NY. We have been in business for over 40 years.Need Supplies or don't see what you are looking for? International Buyers - Please Note. This item is in the category "Stamps\United States\Covers\FDCs (1951-Now)\1961-70". The seller is "tssstamp" and is located in this country: US. This item can be shipped worldwide.