Antique Gilbert Pendulum Wall Clock-was given to me, it's black or dark brown, with carved flower sprays on the top and bottom, it is 24 1/2 inches long and is 8 inches at it's widest place and is 7 1/4 at it's narrower width. The lower piece of glass is beveled, the glass showing the face of the clock is not. The number engraved on the back is 3080. When was it made and what was the cost and what would it be worth now?