Whoops. I misread the labels on the "1904" platters -- that was the date of a patent. I don't see a recording date anywhere on them, now that I've taken a second look.

The single-sided platters are "Red Seal" Victor and Victrola labels, so, without looking at the relevant Red Seal bible, the best I can say is they date between 1903 and 1925.

PM me if you still want them, or want a list of the albums. Heck, if you want the rest of the collection that's left, I can snag them for you, too.