Unidentified photographer / artist
n.d.
The interior of the "Henry Clay" thermoplastic union case made by F. C. Key & Son.

Photographic case
Archives of Modern Conflict OR National Gallery of Canada
The advertising message reads:
 
F. C. KEY & SON,
Manufacturers of the
Excelsior Ambrotype
CASE.
 
F.C. KEY & SON
Are the Original Inventors of the
INSERTED HINGE AND CATCH,
far superior to all others, being im-
bedded in the case when pressed, and
warranted not to break out or spring,
as do all others that are riveted,
or inserted with or without
a metal brace.
 
PHILADELPHIA, PA.
 
LL/12486
 
XL