Vacheron Constantin Les Historiques Triple Date Calendar 18K Yellow Gold Limited Edition

DETAILS
Manufacturer: Vacheron Constantin
Model: Triple Date Calendar
Reference Number: 37150
Movement: Manual winding
Condition: Very good
Gender: Men's/unisex
Time Period: 1990’s
Retail / Compare-At Price: n/a collector's item
Our Best Price: $12,600

CALIBER
Movement: -
Caliber: 1150
Jewels: 33

CASE
Case Material: 18K yellow gold
Case Diameter: 36 mm
Thickness: 10.5 mm
Waterproof: 100 ft./30 m.
Water Resistance: 3 ATM 
Material Bezel: Fixed stepped 18K yellow gold
Glass: Sapphire crystal
Dial: Matte white
Dial Numerals: Applied 18K yellow gold dart indices and Arabic numeral hour markers at 12, 3 and 9 o'clock, railway track minute/date scale around the outer rim   

BRACELET / STRAP
Bracelet color: Brown
Bracelet Material: Leather
Clasp: Vacheron Constantin Maltese cross ardillon 
Clasp material: 18K yellow gold

FUNCTIONS
Triple date calendar with a twin aperture windows below the 12 o'clock position with the day and the month, hand with a blue crescent indicator for the date around the outer rim, hours, minutes and subsidiary small seconds dial combined with moon phases indicator at 6 o’clock

OTHERS
Round-shaped case
18K yellow gold baton-shaped hour/minute hands, baton-shaped with a blue crescent indicator at the tip for the date, stick-shaped small seconds hand
18K yellow gold teardrop lugs
18K yellow gold knurled pull/push crow
18K yellow gold solid case back with snap-on
Solid three-body case, lugs, and stepped bezel are polished
Yellow gold applied Vacheron Constantin Maltese cross and black painted Vacheron  Constantin signature at 12 o'clock
The mechanical manual winding Vacheron Constantin Triple Date Complete Calendar caliber 1150 (base Lemania 3300/Omega 381) movement is rhodium-plated, with fausses côtes embellishment. It's constructed with 33 jewels, a shock absorber mechanism, and a straight-line lever escapement. It includes a monometallic balance that's adjusted to heat, cold, isochronism and 5 positions, a self-compensating flat balance spring, and an index regulator.
There are three pusher located at 2, 4 and 7 o'clock that respectively set the month, the date and the moon phases. The day of the month is set turning the crown and changes every 24 hours.
This Vacheron & Constantin Triple Date Complete Calendar watch was produced in Les Historiques range in the 1990's as a very limited edition of only 400 pieces in yellow gold. 
Incomplete (no box, no papers)