(Originally posted at http://joelnoche.multiply.com/journal/item/112/Design-error on September 13, 2012 3:18 AM)
Of special interest is the pair of stamps shown above. It seems that they have Scott number 1919 and were issued on February 25, 1988. But the one at the bottom seems to be a design error as it has the incorrect date 1938.
Note that the stamp at the bottom has slightly different colors, messier perforations, and blurrier printing. If you have any information about this stamp, please leave a comment. Thanks.