Well Hobo, like yourself, I have now cut cut apart one of each---that's epoxy resin & "tar".
The big difference I'm noting is that the resin model (left in photo) weighs in at 5 oz, whereas the "tar" model (right)weighs in at 8 ounces. Both of these windings came out around 95% complete, so I think the listed weights are fair.
Both coils were sold to me as though they were identical 6V 9N. Obviously there is really a huge difference that would not ever be noticed, in normal conditions. The 8oz. "tar model" is 60% larger than the "epoxy resin model", and that variation combines with a huge difference in packing material.
Not knowing any better, when I started in on the "tar model", I thought "dang, this sucker is really burned up"!
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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