[2] He passed his studentexamen in 1940 and served during his mandatory military service for a period during the years 1942 to 1943 at the legation in London as a cryptographist.

Crafoord continued as cryptographist at the Ministry for Foreign Affairs in Stockholm during the remainder of the war, alongside his law studies.

Crafoord took a Candidate of Law degree in Stockholm in 1945 and became attache in June 1945 at the Foreign Ministry's press agency.

[1] He also had a sojourn in Santiago as a member of Sweden's delegation to the first meeting with the United Nations Economic and Social Council (ECOSOC)[2] before returning to the Foreign Ministry in 1951.

[1] Crafoord's perhaps greatest efforts was during the periods he served in Stockholm at the trading area where he negotiated textile limitation agreements.