Almost certainly it shipped sometime in 1946. I have listed three other .38/44 SNs in the S67xxx range which did. But I can't tell you whether early, middle, or late 1946. There is no good definition of "Transitional" but some collectors consider it to cover those guns produced during the first few years after WWII ended, i.e., made during S&Ws transition from wartime to peacetime production. I do not like the term as it lacks any semblance of precision. Regardless, that one would seem to meet the foregoing definition of being "Transitional."