Vacheron Constantin Historique 18K White Gold Lapis Lazuli Dial

DETAILS
Manufacturer: Vacheron Constantin
Model: Vintage Historique 
Reference Number: 7390
Movement: Manual winding
Condition: Very good, wear is consistent with use and age
Gender: Mens / unisex
Time Period: 1970's 
Retail / Compare-At Price: n/a collector's item
Our Best Price: $8,500

CALIBER
Movement: -
Caliber: K1120 - Poinçon de Genève
Jewels: 36

CASE
Case Material: 18K white gold
Case Diameter: 31.5 mm
Thickness: 5.5 mm
Waterproof: -
Water Resistance: -
Material Bezel: 18K white gold 
Glass: Sapphire 
Dial: Lapis Lazuli
Dial Numerals: No numerals

BRACELET / STRAP
Bracelet color: 18K white gold 
Bracelet Material: 18K white gold
Clasp: Folding
Clasp material: 18K white gold with Vacheron Constantin Maltese cross

FUNCTIONS
Hours, minutes, 40-Hour power reserve

OTHERS
Cushion-shape two-body solid and polished case
18K white gold dauphine-shaped hour/minute hands
18K white gold lapidated lugs
18K white gold solid snap-on case back 
18K white gold pull/push knurled winding crown with Vacheron Constantin Maltese cross engraved
18K white gold intagrated mesh link bracelet secured with a folding clasp 
This Vacheron Constantin ref. 7390 powered by the caliber K1120 self-winding movement is rodhium plated and has fausses côtes and oeil de perdrix decorations. It is constructed with 36 jewels, a straight line lever escapement, a self compensating flat balance spring, a shock absorber, a rotor with a 21K gold segment, a nickel-finished lever movement stamped with the seal of Geneva, and a Gyromax balance adjusted to heat, cold, isochronism and five positions.
This mechanism oscillates at the frequency of 19,800 vph (2.75 Hz).
Introduced in 1967, the movement K1120 was designed and manufactured (but not finished) by Jaeger LeCoultre as the known caliber 920, a result of developement project that involved Vacheron Constantin, Audemars Piguet and Patek Philippe.
This movement, in production for a third of a century, is considered the thinnest full-rotor self-winding movement to this day and of all time.
Fun fact: Jaeger LeCoultre never used this movement in a watch of its own.
Incomplete (no box and no papers)