SAN FRANCISCO, CA.- Seldom seen examples of original WWI aviation art, a jeweled sword made for an Ottoman prince and a rare 17th century Dutch cannon come to auction at Bonhams & Butterfields in San Francisco on Monday, November 15, 2010. The international auctioneer will present its Antique Arms & Armor sale comprising more than 450 lots – including antique American and European firearms, edged weapons, militaria, artillery and a selection of sporting guns. A highlight of the auction is the Ron Farrington Collection of Aviation Art which features oils and watercolors on canvas and board depicting WWI dogfights, aircraft and portraits of aviators. Many of the offered lots are works commissioned by the French, German and American governments, rarely seen at auction. One such example is “Downed Fokker,” an oil painted by Henri Farre, a pilot/observer appointed by the French to recreate scenes of air combat dur