Breitling. A rare stainless steel automatic world time wristwatch with sweep center seconds and date

Breitling. A rare stainless steel automatic world time wristwatch with sweep center seconds and date
Signed Breitling, Genève, Suisse, Unitime, Ref. 2160, case no. 945'010, manufactured in 1961
Cal. 711 automatic movement, 21 jewels, black gloss dial, applied luminous baton numerals, sweep centre seconds, outer revolving 24 hours ring with night and day indication, date window, circular case, black bezel calibrated for the second time zone by subtracting or adding up to twelve hours, circular water-resistant-type case, fluted lugs, screw back, case, dial and movement signed
35 mm. diam.