The front of the photograph is unmarked. The back suggests that the occupants of the automobile are "CAL VADER + WIFE."

If this is Calvin S. Vader, the photo would pre-date his death in 1915. Vader was a Civil War veteran, born in 1842 in Canada. His second wife was Sarah Catherine (Prouty) Holdsworth (1845-1928).

Presently, I am not convinced this is Mr. and Mrs. Calvin Vader.