There are two main varieties of 1963 nickel: the "Regular Strike" and the "Proof Strike". The Proof Strike nickel is distinguished by its sharp details, mirror-like finish, and frosted devices. Proof Strike nickels are typically worth more than Regular Strike nickels, with some examples selling for over $100.
In addition to the two main varieties, there are also a number of other rare and valuable 1963 nickels. These include the "Doubled Die Obverse" variety, which has a doubled image of the Liberty Bell, and the "Repunched Mint Mark" variety, which has a repunched mint mark on the reverse. These rare varieties can sell for hundreds or even thousands of dollars.
If you have a 1963 nickel, it is important to have it appraised by a professional coin dealer to determine its exact value.