Design patent #D11,227 June 3, 1879 by Rodolphe Christesen assigned to Russell & Erwin. An early "Japanese style" knob. Russell & Erwin produced several fine pieces of hardware in this style as shown inThe Doorknob Collector# 120 and the 1883 Russell & Erwin catalog.However, by 1885 only one or two designs were left in the catalog.An articleinThe Doorknob Collector# 153 (www.antiquedoorknobs.org/uploads/7/3/6/9/73695709/tdc153_jan-feb2009.pdf) give more information on Rodolphe Christesen.