I have a photo similar to that originally posted over a year ago. - Franco-Prussian War - 74th Infantry, active in Alsace 1870- Froeschwiller, Strasbourg, Metz, etc. Uniform is essentially identical with regiment number on collar and epaulettes. I can figure out how to post if the interest is still here.
Forgive me if this is not the correct way to do this: Here is the photo I mentioned: This is Henri Bourguignon - taken prisoner during the action in and around Strasbourg Aug-Sept 1870. My own research (not part of firm family info) seems to validate he was a member of the French Army of the Rhine -2nd Infantry Division of the 1st Army Corp, 74th Infantry Regiment of the Line. I assume from the bugle patch, we was in the "signal corp" and the epaulettes suggest he was an officer of some rank. This photos was likely taken between 1868-1872.
Sorry, just realized that the photo was most likely taken prior to Sept 1870