New Orleans Republican, 16 June 1874 (see column 6)...placing C.H. Zimmermann at 129 Canal Street...Established 1844 :
https://chroniclingamerica.loc.gov/lccn ... /seq-2.pdfAnnounncement in The Times-Picayune, 21 September 1869, page 4, to wit: COPARTNERSHIP....Messrs. Edmund Lachenmeyer & Geo. S. Gomperts, (for several years in my house), have become my partners. [The rest is basically no changes.]
C.H. Zimmermann was involved in requesting aid for those unfortunates who suffered from the Mississippi flood of 1874 which affected New Orleans and tributary areas. Maybe relates to his address change?