Hi CR guests of Dale:
Regarding cottered aluminum cranks from the early years;I have an Ohrt of San
Francisco French sport bike with a three speed Simplex TdF drivetrain where the
single chainwheel is on a five screw aluminum cottered crank called "Legedur".
Legedur can be taken to be a French contraction of leger and cegedur.
The Simplex lever on the frame is plated brass,to help with the dating.Called
Le Simplex.
Who's got what else? Seth Finkelstein,Santa Cruz,CA