BSA 250cc Spare Parts List 1954-1957 usedC10L 250cc S.V. Spring Frame 3-speedS10L 250cc S.V. Spring Frame 4-speedC11G 250 O.H.V. Rigid Frame 3-speedC11G 250 O.H.V, Spring Frame 3-speedC11G 250cc O.H.V. Spring Frame 4-speedC12 250cc O.H.V. Swinging Arm 4-speed96 Pagesin english language
BSA A75 Triumph Trident T150 4 V Ignition Coil Set of 3
only for motorcycles in conjunction with points (contact) - not Boyer
measurements see last pict.