Contains a number of materials relating to membership including: 1919-1920 membership application forms, a 1925 membership application belonging to F. L. Martin (a key figure who during his working life held every executive office at Lodge No. 1305), World War II clearance cards 1942-1943, (over half belong to women unionists), eight bound volumes of membership clearances 1942-1961, a dues ledger kept by the financial secretary 1919-1930, roll book 1943- 1961, (the inner leaf lists the 14 point agenda of meetings and the names of officers assigned as delegates to the San Francisco Labor Council etc.), thirty pages of a 1919-1926 ledger detailing members who had retired, transferred out, died or become reinstated, one honory retirement card issued in 1945 along with correspondence detailing why it was withdrawn in 1949, dues books and withdrawal cards 1934-1943, (belonging to the IBT local No. 665, Garage and Service Station employees).

Material in this series includes interesting demographic information concerning place of birth, previous and current employment, gender, age, and previous union membership.