A few months back I posted the copy of R170p below with the punched initials of the New York securities firm De'Coppet and Doremus. Recently I was looking through my collection of cancels on the dollar values and noticed the Wassermann Brothers initial punch cancel on the $2 stamp below. I am looking for examples of other firms that used this type of initial punch cancel. Do you have these in your collection?
My interest at this time is not in examples of perfins, which consists of a series of period shaped perforations that form initials or numbers. The punch cancel itself should form the letter or number.