1972-P Kennedy Half - Machine Doubling or DDO
VTchaser
Posts: 309 ✭✭✭
I see this fairly often on the "2" of 1972, so I'm assuming it is machine doubling. Can someone let me know what they think? 
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To my eyes it looks like die deterioration machine doubling.
Looks like mechanical doubling to me, there is a nice DDO known for the date but your coin does not match it.
Sean
"Keep in mind that most of what passes as numismatic information is no more than tested opinion at best, and marketing blather at worst. However, I try to choose my words carefully, since I know that you guys are always watching." - Joe O'Connor
Yep... Machine doubling....check the CPG for the true DD's...Cheers, RickO
Thanks guys!
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The other question i have, is on some 1971 and 1972 coins, it appears the bridge of the nose doesn't connect to the face. It looks like it's either wear or the strike wasn't heavy enough. See below for a crappy example.
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Note the shelf like appearance.
Real doubling is rounded
Ike Specialist
Finest Toned Ike I've Ever Seen, been looking since 1986
The coin appears to be struck from a die that's been over-polished. The lack of detail is due to the surface of the die being polished away. The most 'famous' example of this is the 1937-D '3-Leg' Buffalo nickel.
Since the bridge of the nose is shallow on the coin, which means it's closer to the surface of the die, it will be polished away first. A 'soft strike' would generally show a lack of details on the highest part of the coin (i.e. lowest part of the die).
Keep looking!
Oh yeah ... welcome!
See http://www.doubledimes.com for a free online reference for US twenty-cent pieces
MD
This is probably the result of an over-polished die. Dies were polished to remove clash marks, and other minor damage, to keep them in service longer. When done to excess, this could actually remove parts of the coin's design. The effect differs from wear, or a weak strike, because it affects low relief details first (those closer to the field, as opposed to the high points of the design). This is because the design is reversed in the die, so the lower points of the design on the coin are the highest in the die, and thus the first to be effaced by excessive polishing. The same phenomenon is responsible for the famous 3-legged buffalo nickel, and the 1922 no-D Lincoln cent.
Outside of those two extreme examples, over-polished dies usually don't add any value, but are an interesting artifact of a coin's production.
I'm still learning, so thanks for the info guys! Glad to be here.
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agree on md and die wear
keep looking as there are many Kennedy's with doubling still in circulation and OGP sets
Kennedys are my quest...