13. When was this dwelling or the building containing this dwelling originally built? (To the best of your knowledge, mark the period in which the building was completed, not the time of any later remodeling, additions or conversions.)
Mark one box only
[] 1920 or before
[] 1921-1945
[] 1946-1960
[] 1961- 1970
[] 1971-1975
[] 1976-1979
[] 1980
[] 1981