The short-lived Eisenhower dollar restored the traditional 38mm size for U.S. dollar coins. But only 6% were struck in 40% silver and originally sold directly to collectors and dealers (those issued for commerce were copper-nickel). Only the San Francisco Mint produced silver Ike dollars, in both BU and proof form, but the BU mintages were considerably less. The Eagle on Moon reverse honoring America's space program began under Ike's administration. The silver Ike dollar series ended with the 1776-1976 Bicentennial issues.