Breitling Navitimer 1 Chronograph 41 Watch - Steel Case - Mercury Silver Dial - Brown Leather Strap - A13324121G1X1 IW371604 While its internal surface is

While its internal surface is shaped like a dome

blue black TwinPro strap with pushbutton folding buckle

brushed bezel with tachymeter scale

fluted crown and set with a sapphire

caliber 1904-AU MC automatic winding movement

Breitling Navitimer 1 Chronograph 41 Watch - Steel Case - Mercury Silver Dial - Brown Leather Strap - A13324121G1X1 IW371604 While its internal surface is41. 00 mm steel case, 14. 44 mm thick, non screw locked crown with two gaskets, bidirectional bezel with slide rule, cambered sapphire crystal with glareproof treatment on both sides, mercury silver dial, Breitling 13 self winding movement with date in dial aperture and chronograph function, approximately 48 hours of power reserve, brown leather strap, tang buckle. Water resistant to 3 bars.