Reverse Serial on Front of $50

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Hi Gang
Recently I took my $50 Error note and put it up on ebay. Some of you have probably already seen it  My question is How Valuable is it?
I've had the post up for less than a day and have had many different offers on it.
The Serials on the front of the note are reversed, most likely from the ink not being dry on the sheet above it, transferring to note below.
Any Advise?

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There's no listing for this particular error type in the Charlton catalogue.  It most closely resembles an Offset Signatures error (E11 - page 361).  However, I expect pricing to be lower for an offset serial number because that type of error could occur on any series of note whereas offset signatures is specific to 1954 series and earlier when signatures were printed separately.  So take the catalogue value of $325 for a $50 note to be a maximum.

Great, thanks for the Advise.
Kindly appreciated.

Anyone can give me "keyword" to find that note on the site ?

In PM


Thank

pm and email sent
FRIEDSQUID

Did you sell it? If not, how much do you want for it?

It is an interesting error to say the least. I also have an error note identical to this one on a current $20.00.(not as nice a condition on my note) However when I examined my note, I found that the serial number was that of the note. I can only surmise that the ink actually bled through the paper when being stamped and not transferred from the note above because it was the serial of the note. ( if memory serves me correctly, I will dig it out later and post a pic)
Funky_phantom