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 Replies: 33 / Views: 15,704 |
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Bedrock of the Community
United States
12437 Posts |
Hehe, the Aussie example is very nice but I missed it while putting up the Nepal 10 rupee  I originally purchased the coin without noticing that bonzer doubling  The reverse featured very strong lathe/reduction lines which is what caught my eye. I noticed the DDO about two months later  |
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Pillar of the Community
United States
4000 Posts |
 Whoa! That is awesome! I want one of those, too! |
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Pillar of the Community
United States
2605 Posts |
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Ooh nice! I want one! For some reason I cannot see Kurt's images - tried different browsers. Quote:
I did notice a difference in the design of the top two coins. Is it supposed to be like that? Are those different years? Good eye, Scoob, that was my initial reaction too. Quote:
I dont know how to read the date on this coin. Amr, if you post their reverses I could date them for you. |
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Pillar of the Community
Australia
652 Posts |
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Pillar of the Community
 Egypt
3470 Posts |
OK....what I understand till now is that this is not a double die and that is a machine duobling. As I understand, the double die results from the movement of the die slightly during the second strike...May anyone of you tell me what is a Machine Doubling, and does this affects the coin value? Thanks  |
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Pillar of the Community
Egypt
3470 Posts |
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Do the designs look different to you? Or is it just the pics? Scooby Due; I will take better scans for all the coins and post them for comparison Quote:
Amr, if you post their reverses I could date them for you. Thanks Slav Kurt; Thanks for the explanation and nice example  biokemist6; very nice coin Yass; Thanks for the link, it is very helpful |
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Bedrock of the Community
United States
12437 Posts |
No, a doubled die has nothing to do with a coin being struck twice. The doubling is on the die itself, not the coin, and the doubling is created during the hubbing process when the die is made. The hub(positive image) is impressed on a die(negative image) twice to bring up the full design. If the die is not perfectly aligned with the hub on the second impression, a doubled die will be created. Machine Doubling is caused by movement of the die during striking, the doubling is flat and shelf-like and confined to the outline of the devices with no separation. |
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Pillar of the Community
Egypt
3470 Posts |
These are the seven coins I have.....the first one on top is the one I am asking if there is doubling in the chin or not, the others are for comparison. I think the date of all these coins is 1977   Edited by EgCollector
01/19/2011 02:23 am
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Pillar of the Community
Egypt
3470 Posts |
Quote:No, a doubled die has nothing to do with a coin being struck twice. The doubling is on the die itself, not the coin, and the doubling is created during the hubbing process when the die is made. The hub(positive image) is impressed on a die(negative image) twice to bring up the full design. If the die is not perfectly aligned with the hub on the second impression, a doubled die will be created. Machine Doubling is caused by movement of the die during striking, the doubling is flat and shelf-like and confined to the outline of the devices with no separation. Thanks for clearing that info |
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Pillar of the Community
United States
4000 Posts |
Soooo......have we diagnosed this? Can we get a picture just like the one in the other thread. That one is perfect. These pics are either too small or too big for me. Unless of course, this has been settled. If that is Machine Doubling, it's pretty extreme. |
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Pillar of the Community
United States
2605 Posts |
About dating. That's simple enough. They all are from the same year, actually we're looking at a single year type, BE 2520, or AD 1977. Maybe it was just an illusion (trick photography) that the images in the original post seemed different.
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Pillar of the Community
United States
4000 Posts |
What about the original doubling question?
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Pillar of the Community
Egypt
3470 Posts |
So, it is Machine Doubling....?! If so...How much did it affect the value, I mean what is the value of the coin with and without the doubling? |
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Bedrock of the Community
United States
12437 Posts |
Yes, Machine Doubling is affecting the nose, lips, and chin. I do not really know the value of this specific coin but MD will not affect it either way. |
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Pillar of the Community
United States
4000 Posts |
I'm not sure. That's why I asked if we could get a picture like you have in the other thread.
The pics in this thread are either too small or too large, at least for me.
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Replies: 33 / Views: 15,704 |
First Page
Posted 01/17/2011 9:42 pm
