This clock was a restoration, I have included before and after photos. I cleaned the movement and made some minor repairs.
Upon inspection, I noticed that the fly had been soldered to the fly pinion.
The fly must rotate on its shaft with only the drag produced by the fly spring. This is very important because if the fly does not spin when the strike cycle stops, the momentum created by the fly could shear off the gathering pallet. This was a fact that I learnt when working on this clock (thanks Jim!).