These pedals are very rare, so I had to make one for my Wurlitzer 112. And I made 4 others to sell.
The pedal itself is solid metal with a plastic casing, meant to be an electric sustain pedal but modded to pull cable instead of push a switch. The top of the pedal has a 3d printed part to hold the red fine tuning shaft upright, the fine tuning shaft allows the cable length to be slightly adjusted. The cable goes to a black plastic case which attaches with 2 screws (included) to the sides of the piano through the threaded holes on the side of the piano. The cable goes through the black case and attaches to a 3D printed part which rotates the sustain rod inside the piano.
I've assembled and tested these on my piano and they all work great, I assume they'll work on any 112 or 112a piano. If for some reason the 3D part doesn't fit on yours (or if it breaks) I can print and send you a modifed part, you just need to pay the shipping.
The cable colours are blue, grey and white, first to purchase gets first choice.
Also includes 2 size 1 1/2" screws to attach to your piano.
If anyone is interested in building one of these yourself I can send you the 3D printer files for free.
Here's a video which shows the pedal working and the 3 locations where you can adjust the cable length: youtu.be/AeymFzx4iwU