Originally Posted by
Cacklinghen
just purchased a vintage Singer 99 serial number AA133489---1924 model...this is one that uses the knee lever-which is missing--does anyone know where I can purchase one--?
The knee lever isn't important. You can bypass it by disconnecting the power cord and replacing it with a bakelite (or other) foot controller. If you already have one it'll be the cheapest option until you find a knee lever.
The model variations are listed
here. 99-13 seems most likely.