"Ascher, I." could be a misspelling for "Ascher, J[oseph]" or could be "Ascher, I[sidor]" if these aren't in fact the same person.
(The capital letters
I and
J were rarely used as stylings in place of each other. See the examples "
I.P. Pixis" for
J.P. Pixis and "
J Lombardi" for
I Lombardi.)