( 3 ) VINTAGE LOCK RINGS, PERRY,GRIMECA, TRAC-COG, FICHTEL & SACHS

YOU ARE BIDDING ON ( 3 ) LOCK RINGS THESE ARE REVERSE THREAD.   1.0 THREAD PITCH,   INSIDE DIAMETER 1.255    LEFT HAND THREAD. THESE ARE NOS ,VERY NICE CONDITION. .I DO KNOW THEY FIT THE PERRY BRAKE DRIVING SLEEVE. ALSO THE GRIMECA BRAKE HUB. A FRIENDLY EBAYER TELLS ME HE USES THEM FOR TRACK BIKE (fixie) HUBS. AND ANOTHER EBAYER TELLS ME THEY ALSO FIT THE 30/40's ccm CRANK COG. AND ANOTHER EBAYER TELLS ME THEY ALSO WORK FOR THE GERMAN FICHEL & SACHS TORPEDO COASTER HUBS.