Authentic Cartier Ronde Must De ladies wristwatch, a classic from Cartier’s Must de Cartier collection — a line introduced in the late 20th century as an iconic yet accessible expression of Cartier’s design and heritage.
This example features hallmark Cartier caseback inscriptions, including:
Swiss made — confirming Swiss manufacture and quality.
Argent — French for silver (indicating sterling silver base).
Plaque Or G 20M — gold plating of 20 microns thickness over silver (vermeil).
1800 1 — Cartier reference number associated with Ronde Must De models.
006559 — unique serial/production number on the caseback.
Cartier’s use of “Argent” and “Plaque Or G 20M” is well documented as gold-plated sterling silver (vermeil) with a 20 micron gold layer — typical of Must de Cartier watches from the 1980s and 1990s.
The watch is powered by a Swiss quartz movement, with reliable timekeeping and classic Cartier execution.
| Specification | Detail |
|---|---|
| Brand | Cartier (Swiss) |
| Model Line | Must de Cartier – Ronde |
| Reference | 1800 1 |
| Case Material | Gold-plated Argent (vermeil) — sterling silver with 20 microns gold plating (“Plaque Or G 20M”) |
| Caseback Markings | Swiss made, Argent, Plaque Or G 20M, 1800 1, 006559 |
| Movement Type | Quartz (Swiss) |
| Dial Color | White (as described) |
| Strap Material | Leather (fair condition) |
| Clasp | Cartier buckle |
| Condition | Excellent (watch head) + Fair (leather strap) |
| Included | Watch only (strap included) |
Must de Cartier was introduced as a more accessible Cartier watch collection during the later 20th century, featuring elegant designs and Swiss manufacturing.
“Argent … Plaque Or G 20M” inscriptions specifically denote that the case is sterling silver with a 20 micron thick gold plating layer, a combination also known as *vermeil — a Cartier hallmark for this era.
Reference 1800 1 appears in multiple verified Cartier Ronde Must De catalog entries and marketplace sales.
Quartz movements were standard for many Must De Cartier Ronde models of this period.
This listing is for the complete watch as shown (watch head + leather strap).
Box and papers are not included unless shown in photos.
Although the strap shows wear and is described as fair, it is original Cartier leather.
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