Walnut Writing Desk with Sliding Tambour Doors and Sycamore Detailing. This piece is made from luxurious American black walnut with blonde detailing in Scottish sycamore. The design is modern and bold and would make a statement in any room. The tambour doors (a time-tested technique invented in France around 1760) are done here in a modern style and give the desk a sleek look. They slide open to either side to reveal a storage area made of sycamore.