Jefferson Davis CDV?

[windband]

I recently acquired a large lot of Books, photos and Ephemera from the estate of Virginia Miller (daughter of famous white house doctor Dr. Thomas Miller). Among the items is an unidentified photo of an elderly man that I believe may be Jefferson Davis. Dr. Miller was very close with the Davis family so much so that Mrs. Jefferson Davis stayed with Dr. Miller while Jefferson Davis was imprisoned at Fortress Monroe (according the book Dr. Thomas Miller and His Times) so it's not unreasonable that they would have been given his photo. The CDV looks very similar to other depictions of Jefferson Davis but I could not find an exact match of this CDV. Any thoughts on the CDV would be appreciated.

Thanks