There are two styles of coils that will fit the 1929 and 1930 Plymouths, one with two wire terminals , not including the distributor wire, and another with three with terminals. The question is , which is correct for what model year Plymouth? The front ignition switch and bezel plate look to be the same. With making part changes through the model year were both versions used in any model year? Just wondering Thanks in advance. - Rich