Only Online Auction

Hong Kong, Mar 03, 2021

LOT 319

Self-winding, chronograph, minute and hour counters, triple date à guichets (with apertures), moon phases; “El Primero”; 18K yellow gold

HKD 30,200 - 43,100

CHF 3,500 - 5,000 / EUR 3,300 - 4,700 / USD 3,900 - 5,600

18K yellow gold, self-winding, tonneau-shaped, gentleman’s wristwatch, water-resistant with case-back screwed by four screws, silver colour dial with subsidiary seconds at 9 and seven horological complications:
· 1/10 second chronograph (activated by the two round-shaped push-pieces) with tachometer scale graduated on the dial for 500 units per hour
· Half-instantaneous 30-minute counter (subsidiary dial at 3 o’clock)
· 12-hour counter (subsidiary dial at 6 o’clock)
· Instantaneous date of the month (aperture between 4 and 5 o’clock)
· Day of the week (aperture at 10 o’clock; indications given in German)
· Month of the year (aperture at 2 o’clock; indications given in German)
· Phases of the moon (aperture at 6 o’clock)

Grading System
Grade: A


Case: 3-8


Slightly scratched

Movement: 3 *
Dial: 3-01


HANDS Original

Brand Zenith, Le Locle

Model “Chronograph Automatic”, “El Primero”

Reference 0150.412

Year circa 1990

Movement No. unnumbered

Case No. unnumbered (by Eric Monnier, La Chaux-de-Fonds)

Material 18K yellow gold

Bracelet green leather strap

Buckle gilded brass buckle

Caliber 418

Height 43.9 mm.

Width 41 mm.

Signature dial, case and movement


Zenith, “El Primero”
The “El Primero” self-winding chronograph was launched in 1969. It was the world’s first and the only one in its category to measure short periods of time to one-tenth of a second. The lever escapement movement beating 36,000 vibrations / hour (high mechanical frequency) and is fitted with a central rotor mounted on ball bearings. The coordination of chronographic functions is operated by column wheel. 50-hour power-reserve.
At this time, two versions of the calibre exist:
· Z 400, instantaneous change of date with quick setting; 31 jewels, diameter 30 mm., height 6.5 mm., 280 components.
· Z 410, instantaneous change of date and day with quick setting, month and moon phases; 31 jewels, diameter 30 mm., height 7.55 mm., 354 components.