Case material: Steel; Charge: Automatic; Conditions: New Presentation condition : With boxes and all papers; Model: Type XX / Type XXI Price on request Gmtbroker Reference: 3880ST/H2/SX0 breguet creates a chronograph with an exceptionally high frequency of 10 hertz (the equivalent of 72,000 vph) - allowing for the chronograph seconds hand counter to keep accurate count up to 1/20th of a second - one of the smallest time divisions to be measured by a serial mechanical caliber! at the heart of this technical exploit is the use of silicon, resulting in more lightweight mobile components and the avoidance of the lubrication problems generated by high frequencies. this watch features: - polished stainless steel case. - brushed finished stainless steel bezel with a polished finished edge. - matte two-tiered dial with raised center & recessed sub-dials. - painted white arabic numeral hour markers in with a red shadow. - raised inner bezel/flange with bold luminous painted hour markings & minute/second/fractions of a second markings printed in white & red. - polished steel hands with luminescent paint fill (hours, minutes, 24 hour & gmt hands). chronograph/stopwatch function: - flyback complication allows for instant restarting of the chronograph with a single push of the button instead of the need to stop, reset & restart the stop-watch. - large red central 30 seconds counter hand - makes a full revolution every 1/2 minute. - features a large brushed steel with red diamond tip central minute counter hand - marks the minutes in 1/2 minute increment