The BC4 combines a 42.7mm stainless steel case and black leather strap with a black triangular patterned dial. Domed sapphire crystal with an anti-reflective coating inside protects the dial, which has Superluminova coated hands, chronograph sub-dials, a date display, and a tachymeter. Powering the watch is the Oris 674 automatic movement with 25 jewels and a 48 hour power reserve, which can be seen through the mineral glass case back. Click here to view the full Pre-Owned watch collection