I just happened to have a Husky 50 sitting here. (Two, actually.) Here is one version of their coil. Slight variations exist from different manufacturers, but they're basically all the same up through the 55 Rancher. Wouldn't that be cool if they could be used in place of the notorious blue Prestolite module. The Husky mounting is obviously inverted/reversed, but it does look real similar. I can pull it to compare some numbers with what you have. The Husky part number would be some variation of 506-xx-xx-01..., probably 506-02-72-01 for one that old.