dumdum:
That is really interesting information. So if this "hub" created the die to be actually used, then the hammer or force coming down would have had a flat surface and just forced the brass into the receiving die. It is certainly a plausible explanation of how the process worked. I guess with experience in the process they would have known just how thick the piece of brass would have to be to achieve the effect.
The difference as I see it to have made a hollow backed badge of any description I think would have required a male die piece to be brought down by the hammer. This would have allowed a thinner badge to have been made and also would have saved a lot of material.
What you have offered really makes sense to me.
Thank you
Don
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