These two examples present a good argument for the late 1800s:

c. 1886
similar hat; similar base with photographer name (left) and place (right); similar rounded corners;
http://
homepages.tesco.net/~roger.vaughan/ryder/presf.jpg

1887
similar lapel style; similar watch chain; similar hat;
http://
www.
cartes.freeuk.com/dec/hincf.jpg

Regards,
Yeates