Bomberg Watch Bolt-68 Racing 4.9 BS45CHSP.059-29.12. Each watch in the Bomberg watches Racing collection features identifiable racing stripes across the dial and strap, enhancing the vintage racing aesthetic. These timepieces are equipped with a 1/10th of a second chronograph function and a unique chronograph trigger for precise timekeeping. The versatile design includes a removable case that transforms the watch into a pocket watch, complete with an included chain and fob. The knurled stainless-steel case and sapphire crystal ensure maximum scratch resistance, while the comfortable silicone strap guarantees a perfect fit for all day wear.