Re: Dot Perf vs Dash Perf
I was just looking through the American Printing Equip & Supply Catalog.
the 2000-01 catalog (page 39) cites Steel Micro Perforation Rule. Perhaps
this might fulfill your search for the elusive dot perf.
yours in lead, ink & paper
Terrence P. Chouinard
Wells Book Arts Center
Aurora-on-Cayuga, New York 13026