:smile Coins and medals have different die axis alignments. Coin reverses are struck in an opposite axis (take almost any coin, hold it by the rim or in a safe coin holder with the obverse showing, turn it over left to right or right to left, and you will see the obverse is upside down). Medal or medallic axis reverses are struck in the same axis (flip the medal or medallic bullion pieces over, left to right or right to left and the reverse matches the obverse). Some Canadian dollars are struck in medal axis alignment and are not error strikes. However, some U.S.A. Coins and world coins are struck with the axis being in an error rotation. All rotated axis strikes are not worth more, but some are. Those coins with reverses being in a 90 or 180 degree (medal axis) are worth the most. There are 30 known U. S. A. 1989-D Congress commemerative dollars with an almost 180 degree rotation. Their current value is $2,000.00. If you collect or invest in Statehood quarters, be advised that quite a number of these have a rotated axis. Rotations of 5 to 25 degrees are not worth more, but those from 30 to 375 degrees are worth from three times as much to over 10 times as much, especially those that have 90 and 180 degree rotations.. Happy hunting, and let me know if you like this kind of trivia, Clinker
Jody: From the 2006 Yeoman's Redbook coin guide and the 2006 North American Coins of Canada, Mexico and United States of America coin catalogue. Clinker
