PA colonial note with the obverse double struck 0

[MICHAEL ZIMMERMAN]

The note is Fr. #206 and the majority of the print shows signs of being struck twice on the front.  The 20 shillings note has the three signatures (not doubled) with one in red.  I would estimate it near the high end of a VF grade.  I can not find any information about colonial currency errors.  Any suggestions?  I was planning on submitting it to PMG.  Mike.  

[NickiO CS]

Hello @MICHAEL ZIMMERMAN

Thank you for reaching out to us. Unfortunately, I do not have any specific resources to refer you to for colonial errors. However, one of the books recommended by the PMG grading team for information on colonial notes, in general, is "The Early Paper Money of America", author Eric P. Newman, Krause Publications, ISBN 978-089689-326-9. 

While I am unable to review a potential error or estimate the grade of a note via the chat boards, as this requires an in-hand evaluation by the grading team, if you would like to post images of your note fellow collectors on the chat board may be able to provide some helpful feedback. 

If you have any other questions, please let us know. 

[MICHAEL ZIMMERMAN]

Sorry that it's taken this long to respond.  I have two photos of the note, one distant and the other a close-up.