The other version is the 1971 S Silver Proof Eisenhower Dollar which came in proof sets or brown boxes with a gold eagle seal ('Brown Ikes') - only 4265234 of these mirror-like silver proof coins were produced. These were special mint condition coins sold to collectors. The common version is the 1971 Brilliant Uncirculated silver Eisenhower Dollar (as depicted above) which came in the blue pack/envelope with a blue seal ('Blue Ikes'). There are two major versions of the 1971-S Eisenhower Dollar - both of them have a silver-clad composition with a 40% silver content. What This Coin Looks Like (Obverse, Reverse, Mint Mark Location, Special Features, etc.):
