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OTTO F. LANGE CO. (THE)
The 1904-1905 Dubuque City Directory located this tobacco business at 155 6th.
The 1915 Dubuque City Directory and the 1916-1917 White's Dubuque County Directory listed 316 BANK AND INSURANCE BUILDING as the address.
The 1918 Dubuque City Directory listed 208 SECURITY BUILDING.