This has double wick. I do not see anything stamped in the cast iron tank. But believe it from the late 1800’s and most likely a radiant brand without the color stencil. The item appears in good restorable overall condition with some average to moderate signs of age and wear. Missing one of the small mica windows, There is a larger flat dent in one of the tin shrouds and another smaller deep dent on the other shroud besides that the top end grate and tin shroud looks in very good condition. The wicks are not the original wide wick but seeming good working condition as found, add this unique item to your collection.