Museum of the History of Science in Oxford, where we kind of just fell in on our first day in town. (This was vacation 2010.) It´s a pocketwatch camera, the "ever ready waistcoat pocket camera".
The Imperial War Museum has one as well, and apparently it was made from 1905 to 1914. One would use a special 17.5 mm film with 25 frames in it.
It doesn´t seem to have measured time, though. Imagine if the designers of this camera could have looked a hundred years into the future and seen what would come! When I see stuff like this, made by those who had the visions, but not the technology, I wish I had a time machine and could go back and share some gadgets with them.
(And I quite often fantasize about showing Jane Austen what a popular author she still is, and how she has influenced other writers.)