Discovery Set
Stephen M. Sullivan - June, 2001

The US Error Note Encyclopedia states "A Mixed Denomination error occurs when a sheet (or sheets) of notes that has received the back and face printing of one denomination gets mixed in with a pallet of notes that were printed with the back and face printings of another denomination.

When the notes receive their overprinting, the result is a set of notes from two different denominations with consecutive serial numbers.

Mixed Denomination errors are sometimes called Wrong Stock errors.

Caution: Each set of theses errors needs to be authenticated. It is possible to create a set of mixed denomination notes with consecutive serial numbers outside of the BEP. There are several examples of advertised sales of notes of different denominations bearing the same serial numbers. These notes are novelties and are put together from fresh packs of 100 notes taken directly from a bank that is furnished new money from a Federal Reserve Bank. It is time consuming but not difficult to create such a run of notes and if the same serial numbers can be pulled from these packs, logic would have it that consecutive notes can also be pulled from the same packs.

At the time of the books' publication there were four reported examples of this error.

Reported Examples include:

Denom / Type	Date	Serial Number
$1 / FRN	1977	A 88585910 A
$5 / FRN	1977	A 88585911 A
Authentication: This set was reported before the Series 1977 $5.00 notes reached the 30 million mark in production (A 30000000 A).
$10 / FRN	1974	E 01300024 C
$20 / FRN	1974	E 01300025 C
$20 / FRN	1974	E 01300026 C
Authentication: Serial Numbers do not always start at 00000000 for each series. Some series start where the last one left off. Series 1974 $20.00 notes printed for the Richmond (E) district started at Serial Number E 16640001 C. Serial Number E 01300025 C (the error) was printed for Series 1969C $20.00 notes.
$2 / FRN	1976	G 28949988 A
$20 / FRN	1974	G 28949989 A
$2 / FRN	1976	G 28949990 A
Authentication: The Overprint on the $20.00 is very high and would be considered a Moderate Misalignment if the note surfaced alone. This high overprint is in the same position that the overprints on the $2.00 notes appear (overprints on $2.00’s are higher than any other denomination).
$20 / FRN	?	K-A Block
$50 / FRN	?	K-A Block
$20 / FRN	?	K-A Block
This set contains 8 $20.00 notes and 4 $50.00 notes. Very little is known about it at this time other than all notes are consecutive and were discovered by a bank teller. Additional information is needed to authenticate this find.

A new set of $20/$100 were reported to Capital Currency, Inc by an ex-bank employee who wrote “These were mint, and I encountered them during the last year of my banking career. There were in a shipment from the FRB, still in the Bureau of Engraving strap, and our teller advised the FRB of being long in the strap. I decided to buy them, and the guys from the Fed were really distressed!"

They have been authenticated and are unusual as they combine the new style $100's that have the Federal Reserve Seal printed with the face printing and the new style $20's that have the seal printed with the overprint. The $100's have two distinct seals because of this anomaly.

Stephen M. Sullivan is chairman of Capital Currency, Inc.. Stephen is the author of the definitive reference book The US Error Note Encyclopedia and is considered to be the one of foremost authorities on US error currency.