here is an American bosch MJA4C 102 base mount clockwise 4 cylinder magneto with a 35 degree lag impulse and variable timing. This is probably the biggest and baddest of the American Bosch family. Extremely well made, robust and reliable. This one has been completely disassembled,blasted, primed,painted, bearings washed,repacked,magnets recharged,new points,Rotor,gaskets.The cap is in good condition and Looks great inside. This was used for a Caterpillar gasoline powered tractor and would be ideal for any heavy duty installations. The parts book for the Cat model 22 shows this to be the factory replacement. It will run larger gasoline powered tractors nicely.Any questions, please ask the old croaker! Will ship to US addresses,payment due in 5 days.May return in 10 days if not pleased.