1869 6c Ultramarine Vertical Bisect (115b)
Left well margined half tied by target cancel and Mechanicsville, N.Y. JUL 6 datestamp on cover to Watervliet Center, N.Y., the cover is slightly reduced at left, unique and extremely fine, Ex. Coulter, with Philatelic Foundation certificates (1954 and 1978). Scott retail $50,000.00
The only known genuine copy of a 6c 1869 bisect and one of only two unique bisects in United States philately, both offered separately in this auction. Catalogue price based on 2012 sale.