Challenge is that the clad sequence is so narrowly collected that there may be rolls of FT dimes just waiting around to find, but so few collectors treatment to submit them. In summary, I do think there must be an industry-vast common for FT and FB designations on Roosevelt dimes. https://henryc198zeg0.ltfblog.com/27551561/manual-article-review-is-required-for-this-article