This machine was a Union Switch and Signal Co. Style C CTC Machine.  This machine was located inside "STEEL" tower located at the east end of CRRNJ Allentown yard.  The orignial machine utilized US&S 510 Time Code equipment to control "VN" and "JU" interlockings.  Steel interlocking was direct wire.  In later years additional equipment was added to handle "Burn","Canal","Ham", & "Treichlers" interlockings which to the best of my knowledge was controlled by US&S 504 Time Code equipment.  The track model and machine hardware were salvaged and remain in a private collection.