BREGUET MARINE BIG DATE In steel, mechanical self-winding movement, reference 5817. Reference: 5817. Serial number: 1761AH. Case: stainless steel, 39 mm in diameter. Dial: light grey guilloché, Roman numeral hour markers, large date at 6 o’clock. Movement: self-winding mechanical, calibre 517GG. Strap: rubber with a Breguet-signed folding clasp. Crystal: sapphire. Accessories: supplied with its case and Breguet warranty. A stainless steel gentleman’s wristwatch with an automatic movement, by Breguet.