LM723 Voltage Regulator
These are not NOS or pulls, but genuine new LM723 voltage regulator integrated circuits in a 14 pin DIP package. You will find these in many synthesizer PSU and notably used in various sections of Oberheim SEM systems, including the SEM itself.
Please note that these voltage regulators are somewhat sensitive to support circuitry. You should fully troubleshoot your issue before installing this chip. For this reason, there are no returns on this item under any circumstances.