Visual Description
The 1997 Tank à Guichets is a platinum Tank, catalogued at 25.5 × 37 mm by Phillips in three sales and 25.5 × 37.5 mm by Phillips in a fourth, Sotheby's and Monaco Legend, with The Hour Markers giving 26 × 37 mm. It has no hands. The hour appears in a window at 12 o'clock, and the minutes are shown in a curved aperture at 6 o'clock. The dial is silvered. The crown is a ruby cabochon, which Phillips says is exclusive to the platinum version; one Phillips lot describes it as red. The case back carries the LC logo with the engraving "1847-1997" and the edition number. A signed 18k white gold deployant clasp closes a crocodile or leather strap.
Reference Significance
This is the only vintage-era Tank à Guichets documented at auction in the sources opened for this page, and it is an anniversary piece: Phillips catalogs it as a re-edition of the 1928 model, made to mark Cartier's 150th year. The edition is small and numbered, so individual watches can be followed from sale to sale.
Catalogs agree on the core specification: platinum, manual wind, cal. 9752 MC, 19 jewels. They differ slightly on case length, and Monaco Legend lists a different caliber designation, so the page records those differences openly.
Historical Context
Phillips dates the Tank à Guichets to 1928. The Hour Markers reports a six-piece run in 1996, with three watches in yellow gold and three in platinum, and then the 150-piece platinum edition in 1997. A Phillips Hong Kong lot carries a limited-edition certificate stamped by a retailer in Osaka on 16 July 1997, and another Phillips lot came with a Collection Privée Cartier Paris presentation box.
The Hour Markers describes the movement as based on a Piaget ébauche. In 2005 Cartier made a pink gold version in 100 pieces (Ref. 2817, per The Hour Markers), and a dealer lists a newer platinum re-edition, WGTA0236. Neither is part of this page.
What to Look For
Begin with the case back: the LC logo, "1847-1997" and a number out of 150. Check the crown, which should be a ruby cabochon, and the clasp, which Phillips and Sotheby's catalog as 18k white gold. The jump-hour display should advance crisply, and the minutes aperture should read steadily.
Do not rely on an A-prefixed number as a reference. Monaco Legend and one Phillips lot print numbers of that form, but they appear alongside the edition numbers and look like case numbers. Documentation varies widely among documented examples, from a stamped certificate and box to a box alone, so judge each watch on its own papers.