Visual Description
The Ref. 2220 is a round Vendôme in 18k yellow gold, 32 mm across. Monaco Legend describes a three-body case with a stepped band, a rounded bezel and Vendôme-type lugs, and Craft + Tailored a crown set with a sapphire cabochon.
The dial is engine-turned, cataloged as silvered or silver guilloché by Antiquorum and Monaco Legend and as white or ivory by dealers, with painted Roman numerals and, in Monaco Legend's catalog, the secret signature in one of the X numerals. The hands are blued steel and sword-shaped. The watch wears on a leather strap with an 18k gold Cartier deployant clasp that is part of the case.
Reference Significance
The 2220 is the Vendôme Bi-Plan: the clasp folds under the case between the lugs, so the strap carries no separate buckle. Monaco Legend calls this the watch's peculiarity, and Antiquorum describes the clasp as integrated to the case.
It is the 32 mm hand-wound Vendôme of its period. The Ref. 78090 is the 33 mm hand-wound Vendôme of the 1970s and 1980s, and the Ref. 67080 the 26 mm one.
Historical Context
Auction houses date the 2220 from about 1990: Bonhams dates one circa 1990, Sotheby's one circa 1991 and Monaco Legend one to the 1990s. Dealers date later examples to the 2000s and to about 2010. No source found gives a production range.
Antiquorum sold the example numbered C 124 195 twice: in 2019 as Reference 2220, and in 2023 under the catalog number W1514457.
What to Look For
Read the case back for 2220 and a C serial, and check that the deployant clasp is built into the case and signed Cartier.
Ask for a photograph of the movement. Monaco Legend, Antiquorum and Craft + Tailored catalog the cal. 9P2, which Antiquorum describes as adjusted to temperatures and five positions; Amsterdam Vintage Watches catalogs a Piaget 40P in an example of about 2010.

