Ed Emmerling & Herb Curthoys were officers in SOSSI and added cachets to almost all of their personal mail. Those also related to an event are found in the Levy Catalog.
Ed Emmerling
10/10/60
Chicago, IL
Printed
Brown & green
#7¾ envelope
Ed Emmerling
04/08/61
Chicago, IL
Printed
Violet & green
On buff #6¼ envelope
