From My personal collection is this wonderful large Seth Thomas Mantel clock. The Adamantine is called Brazilian Onyx. This beauty was completely restored and runs excellent. She measures 12 7/8" tall, 15 1/4" wide and 6 1/2 deep. The Adamantine is amazing with awesome colors and is in excellent condition.
A more Scarce model for your collection. Please see all pictures and feel free to ask questions.