is this the 1 cent 1970 - Double queen's back ? i found it in us penny bank's roll. do you know the value of this canadian cent? http://www.coinsandcanada.com/coins-prices.php?coin=1-cent-1970&years=1-cent-1965-2009
Hey, thats a nice find, heres mine heres a link for this error http://www.coinsandcanada.com/coins-prices.php?coin=1-cent-1970&years=1-cent-1965-2012
The only time I ever see a premium on Canadian Elizabeth II machine doubling is the doubling of the date itself. A 1970 in MS-64 or better (red) with a doubled 0 will carry a small premium, up to 20% of a normal strike in a similar grade.
Didn't know they were calling double queen's back, machine doubling, I know canada does their errors different then the us does, somebody told me Mr. potter is the one that got canada coins going in the error world, not sure, but thats what I heard
There are all kinds of creative names to the various forms of strike doubling and die chips, especially from the numismatic community in Quebec, but the type, or causes, of phenomena such as this, are the same as US coins. Some people call it a 'doubled Queen's back' - but to me, this is merely an example of machine doubling (or strike doubling). Stanton's paper (2004) is an excellent read. http://hermes.csd.net/~coneca/content/StrikeDoublingFlyer-PDF.pdf
But this is from official Canadian web site, and they said it is a : DOUBLE QUEEN BACK " can you please explain to me if it's wrong ?
No, it's not wrong. The back is doubled. It's just not a doubled DIE. The doubling happened during the striking process. The die either bounced or shifted during the striking of the coin.
Please read post # 9 from SPP Ottowa. It's just a name and doesn't necessarily negate a double die strike. Take the anomaly with the shelf like appearance. I know of 3 different names for that anomaly: Machine Doubling, Mechanical Doubling, and Strike Doubling. There may be other names for the same anomaly, but at the end of the day, it's not a double die strike.
This error is known as a die shift, heres some info: Description This error shows a doubling that occurs while striking. Explanations When a die is slack, the striking process is functional, but the die is twisted horizontally at the end of the strike. When he goes back up, the die release the twist and push the metal on the side and upward. This type of doubling is especially visible on the letters and numbers, but occasionally on the drawings. When an employee's quality control realizes this, he only tighten the part of the machine that holds the die. Heres the link to the info http://www.coinsandcanada.com/coins-errors-varieties.php?erreur=die-shift&id=14
No. I meant double die strike. If the die has doubling on it, and strikes the coin, that would be a double die strike.
If the die is doubled, it is referred to as a doubled die. A doubled die that strikes a coin is still called a doubled die (or doubled die strike, though I have not heard that term often usex).
