Blancpain Fifty Fathoms 70th Anniversary Act 1 Series I

Blancpain's Fifty Fathoms 70th Anniversary Act 1 Series I, reference 5010A 1130 NABA, is a dive watch with a 42.3 mm steel case. The case measures 14.3 mm thick, and the lug width comes in at 21.5 mm. A sapphire crystal covers the sunburst black dial, which carries a date window and central seconds. The unidirectional rotating bezel is steel and matches the tool-watch bearing of the case. Self-winding calibre 1315 drives the watch and stores 120 hours of power reserve. A NATO strap in textile closes with a pin buckle. The case is water resistant to 300 metres, a rating fitting for a watch built around diving.