LUCAS AVR4 AUTOMOTIVE CAR/ TRACTOR MAGNETO rotation C/W, c1950's
Lucas AVR4 Car/ tractor, 4 cylinder auto advance Magneo, this can be used in the distributor drive housing of normal coil ignition ( was used by MG and other sports cars of the era) , size of drive is about 1"dia, size of the fixed part about 1 "1/16"dia' , length of shaft about 66mm,,, accordind to the rotor it is c/w rot', but give a great spark both rot' over 15mm turning slow by hand, I Have done no other tests, it may need some adjustments, it may be c11/1`950, check out the last photo