Visual Description
The Ref. 2843 is the Tank Cintrée at CPCP scale: a 23 × 46 mm case in PT950 platinum, dramatically elongated and curved from lug to lug so that it follows the wrist rather than sitting on it. Platinum gives the case a pale, slightly grey luster that reads cooler and heavier than white gold. The warm white dial departs from the stretched Roman numerals of the 1921 original: large painted black Arabic numerals run down the length of the dial inside a black inner minute track, and the hands are blued steel Breguet-style rather than Cartier's usual swords. The dial carries no Paris signature, the only CPCP Cintrée of which that is true. A sapphire crystal covers the dial, and the watch sits on a black alligator strap closed by an 18k white gold Cartier deployant clasp.
Reference Significance
The Ref. 2843 is the rarest of the Collection Privée Cartier Paris Cintrées. The program, launched in 1998, revisited Cartier's most historically significant shaped cases with hand-wound movements and limited production, and the Cintrée was its most faithful revival of a 1920s form. Platinum production was limited to 50 individually numbered pieces, against 150 in yellow gold, and the platinum edition is the one in which the Cal. 9770 MC is consistently documented. Examples appear at Phillips and Monaco Legend Auctions with clear provenance, and collectors who focus on Cartier's mechanical heritage treat the platinum CPCP Cintrée as one of the most desirable modern Cartier watches.
A related curiosity is the Ref. 2989, a possibly unique special-order Cintrée in 18k yellow gold from about 1999 with a rosette guilloché CPCP-style dial, an eight-screw case back and the same Cal. 9770 MC; no other publicly known Cintrée carries a guilloché CPCP dial.
Historical Context
The Tank Cintrée dates to 1921, two years after the original Tank, and has always been made in small numbers in precious metal with hand-wound movements. The CPCP program of 1998 to 2008 arrived as mechanical watchmaking regained prestige after the quartz decades, and the Cintrée, with its unmistakable curved silhouette, was an obvious candidate for revival. The choice of platinum for the smallest edition reflects where Cartier positioned the piece: a connoisseur's watch rather than a catalog item, sold to collectors who already knew what a Cintrée was.
What to Look For
Verify PT950 hallmarks on the case and the engraved edition number out of 50 on the case back; the dial should show Arabic numerals with Breguet hands and no Paris signature. The curved case sides should be free of dents, since repairs on a curved case are more complex than on a flat Tank, and platinum's natural whitish patina is normal and acceptable. The dial should show no hairline cracks, lifting or corrosion around the numerals that would indicate past water damage. The crown should operate smoothly and seat securely, the Cal. 9770 MC should show evidence of regular service, and the deployant clasp should be 18k white gold, signed and secure. Original CPCP-period documentation that matches the edition number carries real weight at this level.