Unfortunately, dies turned to fit Rowley
machines can NOT be modified further. Their openings can NOT be enlarged.
Dies for Hoppers and Canvas Backs
Osborne #16, #18, #20, and #22 button dies have inside diameters that are slightly smaller than standard (this has nothing to do with "Inside Opening"). We can modify these sizes to meet modern American standards so that buttons from other factories (hopper backs, canvas backs, etc.) can be used. This modification is only necessary for Osborne #22 dies and smaller. We used to offer this as a complimentary service but rising machining costs no longer permit it. Osborne wire eyes and flat backs will no longer fit your your modified die, but other brands should.