The ones with the embroidered "OAKLAND" are shown as being from 1968 on the Dressed to the Nines site - but I know they were used after that, too. (For one, I have a pic of Felipe Alou that's got to be from 1970 or maybe1971 spring training)
National Baseball Hall of Fame - Dressed to the Nines - Uniform Database
Does anyone know the full story on this? Thanks.