I know nothing about 78 rpm records and unfortunately can't check them as I have nothing to play them on.
I think they are obviously rare, but hopefully you'll have more knowledge than I.
Purchased in Charity shop.
I have 3 for sale
Frank sinatra. Nancy
Bill Bailey. Rock around the clock.
Josef Locke. Goodbye
All in fair condition. Frank Sinatra one has small chip on very edge.
Any questions please ask.