This is a beautiful, possibly one of a kind, Plume & Atwood Unique oil lamp that was convertedto electric in the early 20th century. Despite numerous hours and plenty of catalog research, wewere unable to find a date of production. The brass pieces were definitely made for the pottery base. Due to the style of the decoration, we are comfortable with the Art Nouveau time period, 1890 - 1914. As this lamp was modified from oil we are going to assume it isthe early part of the period, 1890s. Most impressive is the highly glossed red/brown clay cylinder body of the lamp. Fired in high glossblack glaze then delicately etched or sgraffito with beautiful flowers (lotus or rose) andbutterflies. You can feel the "etching" with your fingers/fingernail. This is truly a beautifully crafted item. As the lamp was refitted to electric, a hole was drilled into the base just under the ceramic rim through the ceramic base. A hole was then punched/torn through the bottom of the oil holder. The electric parts were attached through the oil tube, the Plume & Atwood Unique lid is still in place. The very top of the electric is missing a part. Although the price is high, we feel it is appropriate due to the rarity and design of the piece. Thispiece has left several local experts, one experienced in lighting, scratching their heads.Serious offers will be considered. If you have found information on this lamp and style that candate it, we would appreciating your sharing your information.