Any of the ones with fully mechanical shutters will work without the battery at all speeds. FTb, F-1 ('70's models), and TLb, for example. The EF will work without a battery from 1/2 sec. to '1000 sec., and it has a '125 flash synch due to its unique shutter among FD cameras.

Take a look at this page from the Canon Website for some info: http://www.canon.com/camera-museum/c.../series_f.html.