I have covers from the first day of issue and last day of issue for the Farley imperforates.
I found the first day cachet in Mellone's catalog of cachets listed as 752-771-34 Top Notch.
The problem is Top Notch also did a modified cachet by adding "Last Day Reprints - '35" under the U.S. in the ribbon below the eagle. This change is not listed /numbered in Mellone's.
Does anyone have an idea of what the number would be for the last day cachet?? Or, can you point me towards a source that might have the information??