Here is a list of the various mintmarks used for nickels:
http://www.varietyvista.com/04a%20J...20Styles.htm
To find the information for each denomination, bring up the first listing for a doubled die. This will give you the option for "Design Varieties" as it covers the different obverse/reverse design changes for each of the listings:

http://www.varietyvista.com/04a%20J...20Styles.htm
To find the information for each denomination, bring up the first listing for a doubled die. This will give you the option for "Design Varieties" as it covers the different obverse/reverse design changes for each of the listings:

























