From what I read on another forum, ezest(aka jeweluster) was first used commercially on 8/8/1951 but it seemed to have first been made for use on jewelry and later adapted to coins. If I remember correctly from what I have read, during the 1970's there was a preference for blast white coins and as a result many coins got dipped. Please do correct me if I gotten any of the facts wrong.
I think the first one will most likely back in a problem free holder. The hazy kind of milky look especially on the obverse, is just making me a bit unsure if the second one will will grade problem free. The hair under liberty, face, and wingtips, IMO show signs of wear. IMO, wear on silver tends to show up as flat surfaces that have a dull, dark gray appearance. Also, I don't see the luster or level of detail for darkly toned coins to suggest a higher grade. The third coin appears to have a sort of greasy/shiny luster like on the picture of the reverse which might suggest overdipping or it could be just a result of the lighting.