PATEK PHILIPPE, A FINE AND EXCEPTIONALLY RARE 18K GOLD TWO TIME-ZONE WRISTWATCH WITH THREE HANDS AND BREGUET NUMERALS

PATEK PHILIPPE, A FINE AND EXCEPTIONALLY RARE 18K GOLD TWO TIME-ZONE WRISTWATCH WITH THREE HANDS AND BREGUET NUMERALS
Patek Philippe. Ref:2597HS, No.729444, 1961, sold on 12 September 1974.
12-400hs, rhodium finished 18-jewel lever movement adjusted to heat, cold, isochronism and five positions, monometallic cut compensation balance, swan-neck micrometer adjustment to the regulator, movement stamped with the Seal of Geneva, gilt dial with applied gold Breguet numerals, gold Dauphine hands, third blued steel jumping hour hand (patented in 1959) for indication of a second time-zone, subsidiary seconds, circular case with snap on back (ref:2597, no. 311321), down turned lugs and two buttons in the band for advance and retard of the second hour hand, maker's strap and 18ct gold buckle, movement, dial and case signed.
35mm. diam.