Bottom is covered in black felt but I believe is marked B&H underneath. This lamp is definitely a Bradley & Hubbard design.
Condition: This lamp is in excellent overall condition, some oxidation to metal on one side and corner that could be cleaned off with a wire brush, but I have left it alone. A few metal clips to interior are missing and reinforced clear tape was used by the previous owner to hold the glass in place, as shown in pics. Again, it is very stable and glass unnoticeable from the outside, so I left it alone. Glass is excellent, complete and undamaged.Metal design is unbroken and complete. The item "Bradley & Hubbard 1908 dated Arts & Crafts Prairie School slag glass table lamp" is in sale since Wednesday, April 11, 2018. This item is in the category "Antiques\Periods & Styles\Arts & Crafts Movement". The seller is "truthbeautypower" and is located in Lansdowne, Pennsylvania. This item can be shipped worldwide.