Unknown designer 1960s walnut or rosewood hutch

Please help me figure out more about this lovely buffet/hutch! Possibly rosewood, walnut or mahogany? Numbers stamped on back and the faint appearance of an outline of an oval or circle stamp next to number stamp on bottom piece. Letters "A" and "P" are branded on the back of the bottom piece and the number "5" is branded on the back of the top piece. I can't find any stickers or tags... purchased at an estate sale from the original owners. Thank you!