Simple elements combined with stunning results. Design patent #D20,895 by Rodolphe W.E. Christesen, June 30, 1891, assigned to Russell & Erwin.Design was for Ornamentation of Builder's Hardware. A knob, escutcheon and hinge are shown. SeeN-17500for the oval version of this design. Shown in 1894 Russell & Erwin catalog page 157.