Things You'll Need
Instructions
Measure the diameter of the coin with a pair of calipers. It should be 38.1 mm.
Weigh the coin on a pair of sensitive scales. It should come out at 26.73 grams. Because it would be unlikely for a counterfeiter to succeed in faking both the size and weight at the same time, if a coin passes both Steps 1 and 2, this is a strong indicator of genuineness.
Inspect the coin for certain design features. Expect to see on the obverse an idealized female figure, either full length in classical drapery or as a head-and-shoulders portrait. This is Lady Liberty. On the reverse there should be an eagle and a laurel wreath. These design features were laid down in the 1792 Act and, although the dollar went through different versions such as the Seated Liberty (1836-1873), the Morgan dollar (1878-1921) and the Peace dollar (1922-1935), the key features depicted remained constant. Dollars with other design features will date from the later, cupronickel period. Coins that have similar design features but which aren't dollars won't pass Steps 1 and 2.