This is a beautiful green glass oil lamp.  The pattern is the Clark lamp - cable font with fishscale base - in a pedestal fingerhold shape by the Dalzell, Gilmore and Leighton Company of Findlay, Ohio.  The finger hold lamp measures 6" in height to the top of the font and 14 1/2" if you include the clear glass beaded top chimney.  The lamp has a great #1 brass burner stamped "M. B. Co." on the thumbwheel.  The lamp is in excellent condition.