1857 saw the introduction of perforation, and in 1860 24¢, 30¢ and 90¢ values (with still more images of Washington and Franklin) were issued for the first time. These higher denominations, especially the 90c value, were available for such a short time (a little over a year) that they had virtually no chance of being used. The 90c stamp used is a very rare item, and so frequently forged that authorities counsel collectors to shun cancelled copies that lack expert certification.