This is a very nice 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 1/4" if you include the clear glass beaded top chimney.  The lamp has a #1 brass burner stamped "Victor" on the thumbwheel.  The lamp is in excellent condition with normal roughness on the inside bottom edge - the brass collar appears to have been reapplied sometime during the life of the lamp.