These switches are 1/8" x 27 NPTF as original.
Armstrong Siddeley Sapphire 346 1953-58 - CONTACT POINT to replace Lucas 420197
CONTACT POINTS for Armstrong Siddeley Sapphire Star 1959-60 replace Lucas 420197
Armstrong Siddeley Sapphire 236 1956-58 - IGNITION CONTACT POINTS replc Lucas CS
Armstrong Siddeley Sapphire Star 1959-60 - CONTACT POINTS for Lucas Distr 40650
Armstrong Siddeley Rover Morris 1931 6 Cyl Distributor Cap Remax ES15 D56 D63
AC ARMSTRONG SIDDELEY LEA FRANCIS ROVER 60 RILEY BRAKE SHOES
