The Bror Tamm Collection is arranged by series as described below.

Series 1: Papers Related to Vessels. 1898-1973

Series 2: Personal and Business Correspondence. 1927-1983

Series 3: Research on Various Maritime Topics. 1900-1975

Series 4: Business Records. 1931-1973

Series 5: Items Pertaining to Individuals. 1935-1971

Series 6: Personal Records. 1902-1981

Series 7: Edna Tamm Verzuh Papers. 1942-1997

Series 8: Miscellaneous. 1910-1982

Series 9: Volumes. 1909-1979

Series 10: Volumes. Undated

Series 11: OFMs. 1921,undated