Rare original boxed set of 5 cases, 1973-S Proof Coins. Each sealed two-piece clear plastic case contains six coins: one example each of the Lincoln Cent, Jefferson Nickel, Roosevelt Dime, Quarter, Kennedy Half Dollar, and Eisenhower Dollar ( Copper-Nickel Clad ). case and the frame. This unopened mailing box of coins was recently found in a safe in Mississippi with original mailing label to recipient from The Department of The treasury, U.S. Assay Office label & registration #. ** box was opened to prove contents only & just one of the 5 sealed cases has been opened. ***The 1973-S Proof Set was the first to contain a One Dollar coin since 1904. A Copper-Nickel Clad version of the Eisenhower Dollar was included in the 1973-S Proof Set, adding $1.00 to the face value and justifying (in the Treasury's mind) an increase in the sales price. Sales fell slightly from 1972, but the mintage of 1973-S Proof Sets was still a respectable 2.76 million ( 2,760,339 sets ).