Rolex Vintage GMT Master 18K Yellow Gold Ref. 16758

DETAILS
Manufacturer: Rolex
Model: GMT Master
Reference Number: 16758
Movement: Automatic
Condition: Good
Gender: Men’s/unisex
Time Period: 1981-1982 
Retail / Compare-At Price: $32,000
Our Best Price: $19,950

CALIBER
Movement: -
Caliber: 3075
Jewels: 27 

CASE
Case Material: 18K yellow gold
Case Diameter: 40 mm
Thickness: 13 mm
Waterproof: 330 ft. / 100 m.
Water Resistance: 10 ATM
Material Bezel: 18K yellow gold and black with bi-directional rotatable bezel
Glass: Sapphire crystal
Dial: Black nipple dial
Dial Numerals: 18K yellow gold and luminescent hour indices, minute markers around the outer rim

BRACELET / STRAP
Bracelet color: 18K yellow gold
Bracelet Material: 18K yellow gold Jubilee
Clasp: Fold clasp
Clasp material: 18K yellow gold

FUNCTIONS
Hours, minutes, center sweep seconds, cyclops lens date aperture at 3 o’clock, second time zone with independent rapid-setting of the hour hand (GMT), 48-hour power reserve

OTHERS
18K yellow gold applied and luminescent Mercedes hours hand, spade minutes hand, stick seconds hand and arrowed second time zone hand
18K yellow gold and black bi-directional rotatable 24-hour graduated bezel w/gold toned Arabic numerals every two hours
18K yellow gold screw-down crown with Rolex crown engraved
Self-winding movement, bi-directional winding, Chronometer certificate (COSC),
Breguet hairspring , Microstella precision adjustment with regulation screws, Kif shock protection
The functions include central seconds, rapid calendar advance, hacking seconds
GMT function (dual time zone) in 24-hours mode
This mechanism oscillates at the frequency of 28,800 vph (4Hz).
This caliber movement was produced from 1981 to 1988, was then replaced by the caliber 3175. 
Incomplete (no box, no papers)