Hi Mandy, not a fashion expert either, but from the pictures my guess is later than 1869. Again the shape of the dress would need to be formed see if the silhouette fits late 1800s.
It looks like a mourning gown from the Edwardian Era, so 1900-1910 about.
Good luck!
------------------------------Cynthia Martinez-WoelkProgram EducatorWichita-Sedgwick County Historical MuseumWichita KS-----------------------------------------------------------
Cynthia Martinez-Woelk
Program Educator
Wichita-Sedgwick County History Museum
Wichita KS
------------------------------