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<p>[QUOTE="desertgem, post: 3005259, member: 15199"]To be honest, I do not remember the thread, but the one that says dd.jpg is an example of Mechanical doubling ( MD or MDD [damage]. Notice the main portion of each letter shown is much more narrow than the center portion. A hubbed double die, will increase the thickness in the doubled area because the first hubbing will be overlapped by the second so 1+ a fraction. In MD, it is narrowed and the flattened portion subtracts from the width, 1- a fraction. After 1995 or thereabout with the advent of single squeeze hubbing, which is just once, and doubling is mechanical (MD) to classicists and possibly called a DD by modernists. IMO MD . Jim[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 3005259, member: 15199"]To be honest, I do not remember the thread, but the one that says dd.jpg is an example of Mechanical doubling ( MD or MDD [damage]. Notice the main portion of each letter shown is much more narrow than the center portion. A hubbed double die, will increase the thickness in the doubled area because the first hubbing will be overlapped by the second so 1+ a fraction. In MD, it is narrowed and the flattened portion subtracts from the width, 1- a fraction. After 1995 or thereabout with the advent of single squeeze hubbing, which is just once, and doubling is mechanical (MD) to classicists and possibly called a DD by modernists. IMO MD . Jim[/QUOTE]
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