The following is the third in a series of posts on
double-denomination U.S. notes.
Part 3: Many different combinations
U.S. federal double-denomination
notes are known in many
combinations of currency types and series dates and in various
type has been reported on large-size
national bank notes more than any other category of note, in the
following denominational combinations: $10/$20, $20/$10, $50/$100 and $100/$50.
In some cases, the same combinations are known for multiple banks
of the same series date.
Series 1902 $10/$20 notes are known for banks in Maryland,
Montana, Minnesota, Texas, North Carolina and North Dakota. That wide
range of varieties is probably due to an additional printing run
needed for national bank notes. All of the notes share the same face
and back designs pulled from a pool of shared original sheets; bank
titles were added in a separate printing step, so it is very possible
that a stack of partially printed sheets of $10/$20 notes was accessed
for many different banks without any of the printers noting the error
as the different bank titles were added.
Also counted among large-size errors are $2/$1 1899 silver
certificates and 1918 Federal Reserve Bank notes; and 1914 Federal
Reserve notes in $5/$10 and $20/$10 combinations.
Combinations of small-size double-denomination are fewer: a Series
1929 $20/$10 national bank note, 1934D $5/$10 Federal Reserve notes,
$10/$5 1928A FRNS, the aforementioned $20/$10 1974 notes, and a Series
1950A combination with the face of a $10 Federal Reserve note and back
of a $1 silver certificate (a particularly fun combination of two
denominations and two different currency types).
Keep reading this series: