I've updated the information accompanying the picture of long-levered cambio Corsa shifters in the Pic of the Day album:
http://www.wooljersey.com/
"After more research, I've decided that the rider is probably Alfredo Martini, the bike is his Wilier-La Triestina, and the race is the 1949 Tour de France."
I think I wrote to someone a while back (but cannot remember who...) that no one used Campagnolo's cambio Corsa during the 1949 TdF - this was obviously incorrect. I now belive the entire "Cadets Italienne" or Italian B-team used cambio Corsa shifters.
Aldo Ross
Middletown, Ohio