This generation of wood dial Day-Date is often referred to as burl wood, which is https://www.popomg.cz/product-category/de-ville/ theoretically correct in that burl is a specific grain characteristic that is present on the later generation of wooden dials. https://www.crwwatches.cz/Collection/tortue/ But burl is not to be mistaken as a type of tree (like birch or walnut). Burl is actually a growth that forms on the outside of a tree and in turn affects the https://www.popvivi.co.uk/ grain pattern, producing unique knots in the wood.