Zenith
Excelsior Park Chronographe - Gold Case & Leather Strap

Zenith Chronograph “Excelsior Park” Ref P143 / Cal. 143 18k yellow gold Bi-compax two-register, Rectangular pushers — Light dial Manual-wind 
« A great vintage chronograph is precision… with the warmth of gold. »

This 18k yellow-gold Zenith chronograph, often referred to as P143 (for Zenith calibre 143, based on an Excelsior Park movement), captures the elegant, purposeful spirit of 1950s chronographs: a light two-register dial, dauphine hands and yellow-gold markers that catch the light, and those crisp rectangular pushers with a distinctly mid-century look. Inside, you find the Excelsior Park chapter with Zenith calibre 143 — and, depending on the series, its 143-6 variant (with shock protection) — both sought after for their column-wheel chronograph architecture and reliability. Before chronographs became thick “machines”, crowded with scales and effects, there was a golden era when the complication remained a gesture — almost a courtesy. A start, a measurement, a reset. On a light dial, reading is immediate; on 18k yellow gold, the light does the rest. That is the charm of this Zenith: it doesn’t try to impress, it tries to be right.

The pleasure is very specific on the wrist. Gold brings a warmth steel cannot replicate, yet without ostentation when the design is this balanced: the dauphine hands draw clean facets, the gold markers play like jewellery details, and the two registers deliver calm symmetry. You start the chronograph and you feel “old-school” mechanics in the noblest sense: tangible precision, a crisp action, the sense of owning a true piece of watchmaking — built to last, conceived at a time when elegance and function were not separate worlds.

Zenith calibre 143 is associated with Excelsior Park — a fascinating post-war chapter where major maisons relied on specialist chronograph makers to deliver high-level pieces. Reference sources describe Zenith calibre 143 as an Excelsior Park chronograph produced between 1945 and 1950, with a column-wheel layout. The 143-6 variant is a 143 with shock protection, often given a broader production span of 1945–1956. 

The 18k yellow-gold case immediately places the watch in the dress-chronograph register without losing the instrument DNA: the presence is dense, the display remains crisp, and the rectangular pushers add a very specific design detail — both geometric and refined. Comparable Zenith/Excelsior Park chronographs from this era are often found around 35–36 mm, a size now prized for elegance and comfort. 

The light dial highlights the bi-compax construction: two registers that open the layout and reinforce symmetry. The dauphine hands and yellow-gold markers bring a jewellery-like relief, visible as soon as a ray of light crosses the dial. As for the movement, Zenith calibre 143 (and, depending on the example, 143-6) is a column-wheel, manual-wind chronograph. Comparable listings mention 17 jewels and a beat rate around 18,000 vph, typical for the period, with that precise, mechanical feel at the pushers.  The watch is presented on a brown leather strap, a natural pairing with yellow gold: it adds warmth while staying versatile and easy to wear.

This Zenith is a collectible that you truly wear. By day, it brings old-school elegance with a shirt, a blazer, or fine knitwear. By night, 18k yellow gold and the light dial become instantly more formal: a chronograph that suits dinner, evenings, and events without ever trying too hard. And for the enthusiast, the joy is also in use: timing something, starting, stopping, resetting, and feeling the column wheel at work.Zenith “Excelsior Park” chronograph P143 / cal. 143, 18k yellow-gold case, light bi-compax dial, rectangular pushers, dauphine hands, yellow-gold markers, brown leather strap. (If you share the exact diameter, buckle type, and whether it comes with box/papers, I’ll integrate it verbatim.)

Mostra—renowned for its service and customer experience—has been recognized in the specialist press as the pre-owned specialist. Reviews are verified and rated 5 stars, and every watch comes with an exceptional three-year warranty, rare on the pre-owned market. With a vintage gold chronograph, we also guide you on what truly matters: aesthetic coherence, watchmaking checks, true legibility, and perfect wrist balance—so the watch is as enjoyable to live with as it is to admire.