The show is at a place which also sounds worthy (although somewhat
redundantly titled, my editor suspects): Photo Antiquities Museum of
Photographic History, 531 East Ohio St, Pittsburgh.
The item includes a phone number (412/231-7881) and the show is apparently
open Mondays thru Saturdays 10 to 4 until March 31.
But closed Tuesdays, as well as Sundays.