64. Rolex. A stainless steel automatic calendar bracelet watch with dual time zone Rolex. Montre bracelet en acier avec date et 2nd fuseau horaire mouvement automatique Model: GMT-Master 'Pepsi' Reference: 16750 Date: Circa 1981 Movement: 27-jewel Cal.3075 automatic, adjusted to 5 positions and temperature, No.0448786 Dial: Black, luminous dot hour markers, baton quarters, white outer minute divisions, magnified date aperture at 3, polished Mercedes hands with luminous inserts, centre seconds, arrow tipped red dual time zone hand Case: Brushed and polished tonneau form, screw down back and shouldered screw down crown, blue and red 'Pepsi' bezel insert, No.6250741 Strap/Bracelet: Brushed 78360 Oyster link, end links stamped 580 Buckle/Clasp: Signed folding clasp Signed: Case, dial & movement Size: 40mm Launched in 1979/80 to replace the well-loved 1675, the transitional 16750 is so similar to its predecessor that it takes a keen eye to appreciate the nuances that separate these two models. The main differences can be summed up as a new, more accurate calibre (3075), double the depth rating, a quick set sequence to the date function and a different layering of the hands. The reference was in production for around 8 years before being phased out.