Fyi, I have just posted some pics of a newly restored circa 1933 Umberto
Dei that might be of some interest. The Derailleur is a Vittoria
Margharita (the one with the shifting clappers) which did not come out
till 1934 or so but I thought it made the bike more interesting than
with just a Vittoria that you had to shift by hand. Anyway, for what
its worth.
Edward Albert
Chappaqua, NY