The latest to do just this is French horological experts Bell & Ross, who have created a limited edition series of dramatic looking timepieces called the BR-X1 Tourbillon Sapphire.
Limited to just five pieces, the futuristic appearance of the watches is achieved by the avant-garde use of transparent sapphire crystal to create the entire watch case, including both front and back.
Inside the square case is a transparent circular dial through which you can see the Swiss hand-wind Bell & Ross in-house caliber 285 movement with 35 jewels, 21,600 vph and a power reserve of four days.
The striking look of the watches is completed by a translucent rubber strap with metallic Kevlar weaving with a steel buckle.
Each of the five BR-X1 Tourbillon Sapphires by Bell & Ross are priced at $500,000.