$1 1935-F Silver Certificate with an INVERTED REVERSE ERROR, a true R-6  mistake, according to the 'Relative Rarity Index' on page 29 of the "Standard Guide to United States Paper Money"  3rd Edition by Dr. Frederick Bart, Krause Publications, Iola, WI, (c) 2008—of course, this applies only to the most common small size notes, with Type II invert Backs bumped into the next higher category R-7…and inverted backs on star/replacement notes exponentially scarcer

large size errors are specifically excluded from the aforementioned Relative Rarity Index, as their frequency is so sporadic as to be meaningful an ERROR which is EASY to EXPLAIN, but HARD to DETECT: the alignment of the printing on one side is upside compared with the other...so each side looks perfectly normal (at least in examples printed before 1985)...as such, even those quite familiar with US paper money such as  bank tellers, cashiers, collectors and dealers are prone to overlook the mistake.. yet, when both sides are viewed simultaneously, as in turning the pages of a book, the error becomes immediately apparent. examples exist on both large and small size paper money, dating as far back as the series 1890—although even the Fractional Currency issues printed during the Civil War and the Colonial Currency printed before the signing of the Declaration of Independence suffered from this malady on small/modern size currency printed beginning in 1928, every major class/category has been affected:         United States Notes/Legal Tenders         Silver Certificates         Federal Reserve Bank Notes         National Currency         Gold Certificates         Federal Reserve Notes, with both Type I and Type II varieties

so abundant opportunities exist to form a collection tailored to any criteria:

one from each denomination of $1 through $100

one from each type of paper money issued—either just small size or both large size and small

one from each Federal Reserve district

one example of both Type I and (post-1985) Type II on all presently known denominations

the cause of the misalignment is embarrassingly simple to describe: after the uncut sheets receive their 1st/back printing, the entire pallet is set aside to finishing drying/'curing', a process which typically takes 24 hours or more...if the ends are transposed 180 degrees as they enter the  face/2nd printing presses the misalignment occurs, with the subsequently applied overprint correctly positioned atop the 2nd/face printing, irrespectively "Inverted Backs are perhaps one of the most overlooked error types, seemingly poised for an upward surge in price", according to the author of US Paper Money Errors.

Independently authenticated and graded by:

PCGS FINE 15 apparent, with comment edge tear at top center; paper scuffs; stains.,

Much rarer than any Funnyback invert. Unique for the series!

Auction value of:

                                                                $1100

                                                for this note in a similar grade;

                                    we encourage you to do your own research

we believe that our opening price is below the retail value found elsewhere; and while our starting price is very fair, it is our intent to place quality notes into appreciative collections at equitable prices--so we welcome reasonable counter-offers