Cherrystone Auctions Santa Fe Collection of South America Jan 11, 2012 157 panama Stamp

1909 Balboa, 1c Dark green and black, center inverted, the unique unused example, strong colors, centered a bit to top, fine. This is the only known unused example of this rarity (only seven used examples reported), with 2002 PFC. One of the most important stamps from Panama and one of the rarest inverted centers in the world, ex-Helme, Balner collections (realized $6,750 plus buyer's premium in 2002)
Val. $ 7,500