I found a link for you showing what they look like. Mercury Dimes with Full Bands
I found a link for you showing what they look like. http://www.pcgs.com/News/Mercury-Dimes-With-Full-Bands
Very nice finds! Curious if the 42 Mercury dime is a FSB? Have you checked? FSB stands for full split bands, if you didn't know.
I always thought full bands meant you could see the vertical bands going up and down, and see that ribbon going around it. Thanks for the link I know better now. Unfortunately it does not appear this dime was full band.