What do these deprecated markings mean?
The item in the top left is a 2-pole switch that has 3 positions (32', 16', 8'). In the top right, NC means no connection. The 1% is the tolerance of resistor R5. R14 is a potentiometer (variable resistor).  The arrow is the wiper arm of R14. The -12V is the voltage powering that part of the circuit. The voltage (-9.0V) at the output of U2B is either for purposes of troubleshooting or for an adjustment. The meaning of the star above R2 is probably explained in a note somewhere else on the schematic.