Thomson Bennet type AD4 magneto for a 4 cylinder engine. Made in Birmingham/England. N° 25497. Good condition, only one dust-cap is missing. Clockwise rotation. Magneto gives a good spark. Measures 45mm from centreline to base plate.
"The K3 Magnette must rank in the history books as the most famous and successful of all the record breaking MGs. With only 33 examples produced durin..