2009 Formative Years Doubled Die Reverses
Lincoln cents. Thousands of different dies have been
verified and are illustrated in coin books and posted on web
sites like coppercoins.com.  Many collectors had thought the
1995 Doubled Die Obverse was to be the last major doubled
die the mint would produce, especially with the advent of the
single squeeze hubbing method.  Since that time, strong
Lincoln cent doubled dies have been discovered and
reported.  The 2004 Lincoln cents yielded two strong DDRs,
and 2006 yielded many DDOs including the doubled ear lobe
(DDO-004) and the very popular DDO-003.  With the new
Lincoln cent series, the 2009 Birth and Childhood design,
minor doubled dies have been reported for the obverse and
reverse.  Few of these has really attracted the interest of
variety collectors.  However, the subsequent design called
‘The Formative Years’ has yielded many reverse doubled
dies that have become increasingly popular.  There have
been over 50 different DDRs reported.  Although these may
not be considered major doubled dies, they are significant
anyway.  Some have sold for more than $50.  Almost all of
these have shown one or more extra fingers/thumbs.  The
two examples to the left show an extra index finger.  

Some individuals have doubted that these 2009 doubled
dies are true doubled dies.  The coin certification company,
NGC, has stated that they do not believe that these are
doubled dies at all, and must be ‘something else’.  This belief
is largely due to a misunderstanding of the single squeeze
hubbing process.  Many collectors are not aware of the fact
that most modern doubled dies are more likely to be found in
the center of the design.  This is because of the fact that the
die blank is cone shaped before hubbing.  Bob Piazza states
It is not necessarily the highest point of the relief that we
address when we talk about a single squeeze doubled die.  
We point to the very center of the hub where it will make the
first contact with the die blank. The die blank is conical in
shape, not flat faced.  If the hub and blank are not perfectly
parallel to each other, when the hub is lowered, the very first
‘kiss’ between the two will not  correctly positioned.  This
initial contact begins to leave an impression on the die
blank.  Continued hubbing pressure, or a realization by the
mint technicians that the two are not parallel may result in a
readjustment, slip, or snap back between the hub and die
blank.  Once this has been corrected, or the snap back
occurs, continued hubbing pressure leaves the normal
impression on the die blank in addition to the impression
made by the first ‘kiss’.  This is identified as a Class 8 (tilted
hub) or shifted hub (Class 9 on coppercoins.com) doubled
The 2009D District of Columbia Quarter (DDR-001) is an
excellent example of this type of a center of the design
doubled die.

For more pictures of 2009
Formative Years ddr's check out:
The LCR Top 10 2009 DDR's