I have recently acquired this magnificent grouping.
While not explicitly documented, there is a high likelihood that these insignia are from a single trooper. Provenance: The Putnam Green/Sycamore Collection.
These insignia and their stories are available on Les Hughes’s site.
Insignia of the Office of Strategic Services (OSS)
by Les Hughes
http://www.insigne.org/OSS_main-0.htm