Aleksandr S. Oganesov of Winston-Salem, N.C., found a 2007-D Washington dollar that exhibits a tilted inscription around the entire edge with the tops of all characters either weak or missing.
The ?7? in the date also appears to be widely doubled with a secondary ?7? to the east.
I can only speculate that the wheel that applies the pressure to the coins as they are force-spun through the lettered groove of the edge-lettering machine may have been set too light. This might account for the tilt and weakness of the inscription in general.
It may have also allowed the coin to slip just enough for the ?7? to be sunk into the edge of the coin twice.
Have you found anything like this?
Ken Potter is the official attributer of world doubled dies for the Combined Organizations of Numismatic Error Collectors of America and for the National Collectors Association of Die Doubling. He also privately lists other collectible variety types on both U.S. and world coins in the Variety Coin Register.
More information on either of the clubs or how to get a coin listed in the Variety Coin Register may be obtained by sending a long, self-addressed envelope with 63 cents postage to P.O. Box 760232, Lathrup Village, MI 48076, or by contacting him via e-mail at KPotter256@aol.com. An educational image gallery may be viewed on his Web site at www.koinpro.com.