Banknote questions for an expert, please: Is this an actual paper stock - or is it the result of something to do with the press and the way the paper was used? I have heard it both ways. - Is there an inexpensive stamp with the Continental vertically-ribbed paper one could obtain for reference? I am aware it is extremely difficult to photograph or scan. - It appears the paper was only used between (apx.) May and December of 1873. Is this correct? - Were plates made with a Secret Mark for the 24-cent Scott? I've heard both 'yes' and 'no' - although if 'yes' they were obviously never used. I've done quite a bit of research on the large Banknote 24-cent Scott - and I still find it amazing there is only a single copy known of #164. I believe it last changed hands via a Siegel auction for $325,000.00. http://www.siegelauctions.com/dynam...le_no=888&sale_date=Tuesday, December 7, 2004 Thank You!