Morgan Dollars are a type of silver dollar minted by the United States from 1878 to 1904 and again in 1921. Designed by George T. Morgan, these coins feature a profile of Liberty on the obverse and an eagle on the reverse. The Morgan Dollar is highly collectible due to its historical significance, silver content, and varied mint marks, which can greatly affect their value. The first year of issue, 1878, marks the beginning of their popularity among numismatists and investors.