Originally Posted by Steve_H
. . . Hum.... looks like the factory had some 6 volt coils left over...for some years, and years. Then they went to an internal resistor....the spec for the coil itself did not change much it would seem. Actually that is good use of engineering resources, The original coil was well thought out and no big changes were needed. . . .
Ballaster resistor - resistor coil.

I thought a 6v coil produces 6v and a 12v coil produces 12v and a ballast resistor-ed coil produces 8-9 volts?

http://www.mossmotors.com/forum/forums/thread/5684.aspx