SPECIFICATIONS

Brand: Vacheron Constantin
Model: Vintage Historique 
Reference Number: 7390
Movement: Manual winding
Condition: Very good, wear is consistent with use and age
Gender: Men's
Time Period: 1970s
Box: No
Papers: No 

THE CALIBER

Caliber: K1120 - Poinçon de Genève
Jewels: 36

THE CASE

Case Material: 18K white gold
Case Diameter: 31.5 mm
Thickness: 5.5 mm
Waterproof: -
Bezel Material: 18K white gold 
Glass: Sapphire Crystal
Caseback: Solid
Dial: Lapis Lazuli
Dial Numerals: No numerals

THE BRACELET / STRAP

Bracelet Material: 18K white gold
Buckle: Folding
Buckle Material: 18K white gold with Vacheron Constantin Maltese cross

THE FUNCTIONS

Hours, minutes, 40-Hour power reserve

FURTHER READING

This Vacheron Constantin ref. 7390 powered by the caliber K1120 self-winding movement is rhodium 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, resulting from a development project involving Vacheron Constantin Audemars Piguet and Patek Philippe.
In production for a third of a century, this movement 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.

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 integrated mesh link bracelet secured with a folding clasp 
Incomplete (no box and no papers)