Case in steel with a finely fluted caseband. Sapphire-crystal caseback. 34.6mm diameter. Welded lugs with screw bars. Water resistant to 5 bar (50m).
Dial in white mother-of-pearl. Individually numbered and signed BREGUET. Hours chapter with Breguet Arabic numerals. 30 minutes counter at 3 o'clock and 12 hours counter at 9 o'clock. Breguet open-tipped hands in polished steel.
Self-winding chronograph movement with dates and small seconds. Numbered and signed BREGUET. Cal. 550, 10 ½ lignes, 47 jewels. Power reserve of 45 hours. Inverted in-line Swiss lever escapement in silicon. Flat silicon balance spring. 3Hz frequency. Adjusted in six positions.