Early 20th Century Frosted Glass Converted Oil Lamp with a Grape Motif. Now electrified, glass body and shade with grape motif in relief, and a spelter grape motif base. Shade marked, 'Patent 40712, May 31 1910'. Wick control knob marked 'Made in U.S. of America'. Early 20th century. {Approximate dimensions: 25 high x 13 inches diameter.}. Condition: Patina to the metal, small chips to the shades edge. The support the shade lays on is a bit flimsy and tilted.