I think that the footpad reveals that it is a Ludwig interpretation of a Fraser, patented bass drum pedal from around 1920.
The pedal is much worn and corroded but by no means beyond restoration.
I will begin by removing the badly corroded components, clean up the brass, replace the spring and link yolk. The badly worn pivots and fulcrums I will fill with braze and re drill. After a refit of all new components, screws, etc, I will have the unit nickel plated.
