Sargent Studio was a photographic studio at 154 Boylston Street, Boston, Mass., USA, in the 1930's to 1950's.
Among other work, they provided many of the yearbook photos for colleges like Harvard.
Several hundred members of the classes of 1943 and 1944 still have not
had their pictures taken for the 1943 Album, the year book reported
Since the period for sittings in the Houses is now over, all these men
must go into Sargent Studio, 154 Boylston Street, Boston, any day this
week between 9 and 5 o'clock. If any men do not do so, the Album will
be forced to use their pictures from their Freshman Redbook. Because
of the added expense caused by this move, these men will be liable to
an extra charge
Source: Harvard Crimson, October 29 1942
They were still active to at least 1954, producing the 1954 Bridgewater State Teachers College Yearbook in that year:http://vc.bridgew.edu/cgi/viewcontent.cgi?article=1055&context=yearbooks