Hi Peggy, check this website out to learn more about different error types: http://www.error-ref.com/ Also the correct terminology is "Doubled Die," technically there is no such thing as a "double die." When searching for doubled die coins you should definitely check these sites out: http://doubleddie.com/ http://varietyvista.com/ They are awesome, you can search by year/mint and compare images to get a better idea of what you may or may not have. I am fairly new to this myself but can tell you from my experiences they have helped me immensely. They have also probably saved the good folks on here a lot of time and frustration in dealing with my poor photography skills and lack of knowledge lol. Disclaimer: this post is not to discourage you from creating posts and asking questions, but rather to help you in your search and learning process.
