For C15 250 cc models. OEM part number 67-0101.
40-2710 BSA C15 B25 B40 250 350 1 3/8" FINNED EXHAUST CLAMP & SCREW UK MADE
BSA C15 B40 C15T C15SS 250 Workshop Manual Service Sheets Swinging Arm 1958-66
BSA C15 STAR & C15 SPORTS STAR ORIGINAL FACTORY PARTS CATALOGUE
BSA C15 250cc STAR MOTORCYCLE METAL SIGN.(A3) SIZE.VINTAGE BSA MOTORCYCLES.
BSA 00-5105 looseleaf SPARES PARTS BOOK BSA C15 Star Sports Star Trials 1960-64
BSA 250 cc B25 and C25 Spare Parts Catalogue , original 1967