Zenith Horological School of Porrentruy Ref. 01.0500.400 Chronograph
Record status
Individual type · partial
Period
circa 1990-2000
Maker / issuer
ZenithThis Zenith gentleman's wristwatch is identified as a school piece (Pièce Ecole) associated with the Horological School of Porrentruy. It is a self-winding, tonneau-shaped chronograph crafted in stainless steel.
The watch is powered by the Zenith Caliber 400 Z movement. The silver-colored dial features subsidiary seconds at the 9 o'clock position, a 30-minute recorder at 3 o'clock, a 12-hour recorder at 6 o'clock, and a date aperture between 4 and 5 o'clock. A tachometer scale is graduated on the dial for 400 units per hour. The case measures 37.4 mm in diameter at the bezel, with a height of 45.6 mm and a width of 38.5 mm. It includes a sapphire-crystal snap-on case-back, providing visibility to the movement.
The watch is presented on a brown leather Zenith strap with a stainless steel Zenith buckle. The piece is attributed to Laurent F., Master Watchmaker.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Chronograph
- Maker
- Zenith – Horological School of Porrentruy
- Functions
- Chronograph, date, sub-seconds
- Case material
- Stainless steel
- Place recorded
- Switzerland
- Case dimensions
- 37.4 mm x 45.6 mm x 38.5 mm
- Movement serial
- 127 955
- Movement caliber
- 400 Z
- Reference number
- 01.0500.400
- Maker / attribution
- Zenith
Design
- Movement
- The watch is powered by the self-winding Zenith Caliber 400 Z. This movement is a chronograph with minute and hour counters. The movement is visible through the sapphire-crystal case-back. The watch is designated as a Pièce Ecole or school piece, linked to the Horological School of Porrentruy and noted in relation to Master Watchmaker Laurent F.
- Case and Dial
- The watch features a tonneau-shaped case constructed from stainless steel. It is water-resistant and includes a snap-on case-back fitted with a sapphire crystal. The case is equipped with two rectangular push-pieces located on the case-band to operate the chronograph functions. The dial is finished in silver and includes subsidiary dials for the horological complications. The subsidiary seconds are placed at 9 o'clock, the 30-minute recorder at 3 o'clock, and the 12-hour recorder at 6 o'clock. A half-instantaneous date aperture is located between 4 and 5 o'clock. A tachometer scale is graduated on the dial, calibrated for 400 units per hour.
- Visible features
- • Rectangular-shaped chronograph push-pieces • Visible El Primero caliber through sapphire case-back • Tachometer scale printed on the outer dial periphery • Date aperture positioned between 4 and 5 o'clock
- Provenance and Identification
- The timepiece is documented as a Zenith El Primero model, specifically produced as a school piece for the Ecole d’Horlogerie in Porrentruy. The watch carries the reference number 01.0500.400 and is assigned movement number 127 955. The watch is fitted with a brown leather strap and a stainless steel buckle, both signed by Zenith. The auction description notes the piece as a gentleman's wristwatch from the 1990-2000 period.
Identification
- Reference
- 01.0500.400
- Serial number
- 127 955
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: The exact provenance of the association with 'Laurent F.' is not detailed beyond the auction report
- Research required: Specific production year is given as an estimate rather than a confirmed date