Just so Crip can use this e-beating as a learning experience, the British equivalent of the American Office of Strategic Services was the Special Operations Executive, or SOE. The SOE was, in fact, created and operating over a year before the OSS's progenitor, the Coordinator of Information (COI) office was established (SOE was established in early 1940; COI in July 1941, OSS in June 1942). The CIA has a good history of the OSS available on their website at:
http://www.cia.gov/cia/publications/oss/ .
NDD, I believe the reason SF's lineage is linked to the FSSF and the Ranger Companies vice the OSS's OGs is due to that whole "the OSS was technically a civilian organization, not a military unit" argument in the TIOH's eyes. Why let reality bugger up a regulation-consistant story, right?
AL, 'knifes'?
As for the look of the dagger in the SF SSI, I'll bet that CPT Frye intended for it to be a V42, but mass production embroidery techniques in the 50s was limited in its ability to accurately reproduce the details of the dagger.