Here is a NOS round rubber handset coil cord to use for  Western Electric 500  Desk telephones.  Perfect and especially made for the G1 handset The 4 conductors are  color coded Red, 2 White and Black.  These were actually made for Western  Electric but you can use them for Automatic Electric telephones also. Has restraints on both ends. Very nice cords. Great also for Stromberg Carlson 500 and ITT 500 desk telephones.