LOS ANGELES, CA.- Bonhams & Butterfields announces its sale on September 4, 2011 of gold coins from the Estate of Hellen and Charles Mapes, of Reno, NV. The eponymous Collection, once owned by the famed hotel and casino mogul Charles Mapes, includes a rarely seen, high grade 1870-CC Liberty Double Eagle coin. This date and mint are well known to numismatists as the top Carson City rarity in the Liberty Double Eagle series. In fact, it is the rarest of all CC gold coinage. This particular coin has been in the Mapes Collection since it was purchased in February of 1961 from the fabled Kreisberg-Schulman Auction of February 16-18, 1961 held at the Waldorf-Astoria Hotel in New York City, and can be considered a “discovery” piece due to the length of time since its last offering 50 years ago. Knowledgeable researchers estimate that approximately 35 to 45 1870-CC $20 coins exist, most in the Very Fine to Extremely Fine grade range.