In a box of coils I have come across 3 "Champion" trembler coils and wonder if anyone knows anything about them please particularly when they were produced and what the case is made of (plastic?). The core is almost flush with the top of the case, did these use different points to the standard KW type? The contacts on the side are smaller and the bottom one is totally different. The opposite side to the 2 contacts there are 2 holes one with a screw in that has some continuity with other contacts. Though I think they would fit a Model T I am wondering if they were for something else. Do not intend using them just intrigued. Thanks John
Electric fence coils.
Used inside a sparkplug tester.