The Girl Scouts of America held in 1956 the first Senior Girl Scout Roundup. The event was located in Milford, Michigan. A total of 5,000 girls attended.
![Girl Scout Roundup Cachet](levy56-20.jpg)
Two cachets and three post cards printed by SOSSI member Harry Thorsen are known. There was no special cancel.
![1956 Roundup Patch](roundpatch1.jpg)
SOSSI Journal, Volume 27, Number 4, April 1978