The brass screw doesn't appear to have been screw in to keep the assembly in check.View attachment 753574
The pallet assembly (Red Arrow) is mounted on a steel pin projecting forward from the back plate.
The brass screw serves as a stop to keep the assembly from moving forward and helps to keep the escape wheel centered on the pallets (brass rollers). If your clock was running then this never needs to be adjusted.
The signature, movement number, and date are probably on the back of the dial near the edge. Look in the narrow slot between the front plate and dial on both sides of the clock. Sometimes the movement number is also stamped on the back of the back plate. Looking forward to seeing photos of your clock.
I have looked all over this clock and have not found any signature, nor any stamps where one would normally find them.
Photos to come soon.