Now I didn't say DD of 1855 was the same as Monsieur Pondevaux of 1855. I'm sure info on the medal is out there, I just haven't had the time to scour for it. I've seen a reference or 2 that gives that the concern PONDEVAUX ET JUSSY was dissolved in 1875. So between 1867/1868 & 1875.

Rebaud.P is for the arquebusier, armurier P. Rebaud was was the frame filer/action fella.