From the Heritage Auction Listing:

Undated Three-Piece "Clover Leaf" Eisenhower Dollar -- Struck on Clad Dime Planchets -- PR68 Ultra Cameo NGC.

The word unique is used perhaps too often by error coin catalogers, but it is the single word that best describes the present lot. Three clad dime planchets were simultaneously struck by a pair of Ike dollar dies.

The planchets touched but did not overlap, and formed a "clover leaf" pattern with the top planchet centered above the remaining two planchets.

Only the 1 in the date is present, and the mintmark is absent, but Earth is complete, and confirms the reverse is Type Two, struck in proof format only during 1971 and 1972. A showstopper mint error on a popular obsolete type.

Ike $1 "Clover Leaf" (Coin 1 of 3)
Ike Dollar Struck on a 10¢ Planchet
NGC Proof 68 ULTRA CAMEO







Ike $1 "Clover Leaf" (Coin 2 of 3)
Ike Dollar Struck on a 10¢ Planchet
NGC Proof 68 ULTRA CAMEO








Ike $1 "Clover Leaf" (Coin 3 of 3)
Ike Dollar Struck on a 10¢ Planchet
NGC Proof 68 ULTRA CAMEO