2004 P Wisconsin Quarter With Extra Leaf

Wexler lists not DDRs on the leaves for this mint/State. But lists a doubling on the nose area:
http://doubleddie.com/190932.html
You might want to see what areas this is happening? (news to me also)

Check the link I posted Chase007.

Which I also mentioned in my post. The story I heard was someone at the Denver mint altered the dies to make these marks. So it is reasonable, that just the Denver dies are affected. Must have been in the die making shop, as the die would have to be heated to soften it or was altered before it was hardened. Thus the dies made a full run on these dies. (the idea that there were altered is that there is no normal reason for the dies to have these lines as they do not follow any design of the hub. So need to look for DDRs on other mints dies. Just this mints dies were altered) A second point is that the areas affected are on the outer part of the die. (CLASS 9 Doubled dies) The single squeeze dies are less often to affected with doubled dies on the reverse die areas. (CLASS 4 + 8 do affect some outer devices) Most of the single squeeze dies affect the central areas of the dies. The snap back into correct alignment usually does not alter the further devices as the design is usually correct by the hubbing, just not as often as the central area would be left altered. On the obverse devices, you see the hubbing that distorts the devices more often than on the reverse single squeeze die patterns. Why?

Totally useless and only slightly off topic trivia time . . .

On the Denver mint high and low leaf varieties:

In FY 2008, the United States Department of the Treasury Office of Inspector General investigated the events related to the high leaf variety. OIG issued a report stating that the high leaf variety was caused by an "element of the production outside of human control," and ruled out a clashed die as a possibility. The report suggested that a press operator noticed the problem, shut down the press and then promptly went to lunch for an hour and a half. The press then supposedly was restarted by some unknown person while he was at lunch, and somewhere around 35,000 to 50,000 coins were produced and bagged for shipment before he returned from lunch.

The OIG explanation sounds like a baloney sandwich, but that's the official version of the high leaf quarter. As a side note, a couple years after the Wisconsin quarter fiasco, Denver acknowledged minting about 750 quarters per minute per press. At that rate, an hour and a half lunch would have resulted in 67,500 quarters.

I'm not aware of any explanation for the low leaf quarter.