Of the 90% silver US coins, I think the best choice is the half dollar coins for the following reasons: - The overall wear from circulation is less than dimes or quarters. This could be due to the half do... read full review
most of these coins minted are clad not 90% silver, so watch out
Watch out for these coins being 90% silver or regular "clad" (copper/nickle). According to wikipedia (http://en.wikipedia.org/wiki/Kennedy_half_dollar_mintage_figures), there were 878,792 90% silver ... read full review