Is This A Faulty Planchet? 2006 Australian Error?

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Author	Replies: 12 / Views: 3,094
triggersmob Pillar of the Community Australia 9416 Posts	Posted 02/27/2007 08:04 am I found this $1 in the till at work today. It looks as if it may be a faulty planchet, half the date is missing. What do you think? Steve Report this Post to the Staff

markn Pillar of the Community Australia 1295 Posts	Posted 02/27/2007 3:24 pm Is there a depression across that whole area? Report this Post to the Staff
triggersmob Pillar of the Community Australia 9416 Posts	Posted 02/27/2007 4:57 pm Markn, yes that part of the coin has a depression between the '0' and the Queens neck. Steve Report this Post to the Staff
Yass Pillar of the Community Australia 652 Posts	Posted 02/27/2007 8:50 pm Its a definite planchette errror. Here some other examples http://www.coincommunity.org/galler...hp?pos=-3524 http://www.coincommunity.org/galler...hp?pos=-3574 I have a few more very similar to yours. 2006 seems to be a good year for them. Report this Post to the Staff
swamperbob Pillar of the Community United States 5362 Posts	Posted 02/27/2007 9:38 pm Looks like a grease blob on the die. Very common on US quarter dollars. If the planchet were at fault there should be a corresponding weak spot on the opposite face of the coin. Edited by swamperbob 02/27/2007 9:39 pm Report this Post to the Staff
triggersmob Pillar of the Community Australia 9416 Posts	Posted 02/28/2007 06:18 am Yass, thanks for the pictures. Swamperbob, the reverse side is perfect. Steve Report this Post to the Staff
swamperbob Pillar of the Community United States 5362 Posts	Posted 02/28/2007 09:54 am Yass Those also appear to me made from greased dies. triggersmob The fact that the area opposite the missing detail is complete "seals the deal". You need to think of the strike in terms of how pressure transfers a feature from die to planchet. A defective (tapered or thin planchet) causes a loss of detail because there is not enough metal available to fill the die. A failure to fill on one side REQUIRES that the same effect happens on the opposite side of the planchet. The designs "come up" on the opposite sides at the same instance and one side can not come fully up while the other does not. The grease (which is very hard old grease filled with metal dust) fills and clings to the die. This "fill" provides the resistance that allows strike pressure to develope uniformly over the entire surface. Now there are other possibilites that could make a similar impression but they all involve strikes made through various forms of debris. Report this Post to the Staff
Yass Pillar of the Community Australia 652 Posts	Posted 02/28/2007 3:18 pm Thanks Swamperbob. While not all that common on our coins, they do look terrfific if you can get them while there still uncirculated. Report this Post to the Staff
triggersmob Pillar of the Community Australia 9416 Posts	Posted 02/28/2007 5:14 pm Thank you for your replies. Steve Report this Post to the Staff
swamperbob Pillar of the Community United States 5362 Posts	Posted 02/28/2007 10:56 pm I agree they can be very nice in MS. I have a pair of US quarters dated 1996 that I got from a Bank roll that have the identical grease spot - and the second still has a small bit of the black grease attached. I put it in a 2x2 with the grease in place. Report this Post to the Staff
Mila_cent Pillar of the Community United States 1767 Posts	Posted 02/28/2007 11:57 pm swamperbob... quote: and the second still has a small bit of the black grease attached. I put it in a 2x2 with the grease in place. I am a bit confused on this 'grease' thing can you post a pic so I can see what you are referring to? teach me, show me, I want to learn. Thanks. Report this Post to the Staff
swamperbob Pillar of the Community United States 5362 Posts	Posted 03/01/2007 01:20 am Hi Mila_cent - the pictures on this thread show the loss of detail caused by grease clinging to the die. I don't have a picture of my coin with the grease - but even if I did - it would look like a dirty coin with a black spot where the missing detail is located. The grease is harder than you would normally expect. It is old grease that has stiffened by the addition of dust, dirt and metal powder that results from the wear of the metal components of the press. This old grease simply falls into the coining chamber and sticks to the die for a while. Eventually, it gets spotted by a mint worker who can stop the press and brush the die with a wire brush. At times, they also simply fall off. But while it remains unnoticed - the grease fills in a portion of the die and the coin metal can not push into the space occupied by the grease. That may sound impossible - because everyone "knows" that grease is softer than metal. But the problem here is the speed of the strike and the fact that in a closed coining chamber - the grease has absolutely no place to move to. It can't be compressed enough to transmit the complete design - so the best you get is a ghost image of part of the design. If you have ever seen a "dropped letter" error, they are caused by this same grease material. There is one shown in this weeks edition of Coin World. I hope that helps. Report this Post to the Staff
secretsquirrel Valued Member Australia 161 Posts	Posted 04/04/2007 08:10 am Yes is struck thru grease and looks to be the same as a few 2006 roo $1 ive seen. Report this Post to the Staff
	Replies: 12 / Views: 3,094

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