It is my opinion and I am sure I will be lashed to the whipping post and flogged senseless, that the coil in question is a Wico. I am currently working on a Chrysler 6 horse motor and it has those type of coils. This motor is a 60’s motor and the coil is a touch different as the spark plug wire is permanently fastened to the coil where as this and later coils had the coil with a replaceable spark plug wire that slides in the hole.