Cartier Tank Basculante 2405: The Quartz Reference That Makes the Case the Complication
The Cartier Tank Basculante ref. 2405 is easy to misread. It is compact, quartz-powered and visually restrained, while the better-known mechanical ref. 2390 attracts more attention from movement-first collectors. But that hierarchy misses the point of the Basculante. The defining complication is not behind the dial. It is the case itself: a rectangular watch that lifts, turns through a vertical axis and can stand like a miniature desk clock.
The case is the complication
Cartier put the Basculante into commercial production in 1932, using a solution that is mechanically and visually different from the side-sliding Reverso. The inner watch pivots vertically within an outer frame. Rotate it far enough and the dial can face the wearer, disappear behind a protective back, or sit upright for use on a desk.
That range of positions gives the design more than novelty value. The upper cabochon, exposed frame and layered construction create a watch that changes character every time it moves. Closed, it reads as a disciplined Tank. Open, the architecture becomes the subject.
Why the quartz ref. 2405 deserves attention
The modern Basculante returned at the end of the 1990s in several forms. Ref. 2405 is the steel, quartz counterpart to the hand-wound ref. 2390. Period and auction references generally place it around 2000, with dimensions quoted at roughly 23.5 by 35 millimetres; small differences between published measurements are normal for a case with several nested components.
Quartz is not a compromise here in the way it might be in a watch whose identity depends on a celebrated calibre. The 2405 preserves the full physical ritual: release the inner case, rotate it, decide whether to show the dial, protect it or stand it upright. It also keeps the proportions slim and makes the watch straightforward to live with after long periods off the wrist.
The white Roman-numeral dial, blued sword hands and railway minute track supply the familiar Cartier grammar. The secret signature integrated into the VII is a useful reference point, while the blue cabochon at twelve becomes both crown and visual hinge marker. On ref. 2405, those formal details matter more than an argument about mechanical versus quartz.
What to inspect before buying
Condition assessment should begin with the parts that make a Basculante a Basculante. The inner case should lift, rotate and settle into its intended positions without obvious looseness or resistance. The outer frame deserves close inspection for distortion, uneven gaps and over-polishing, because its geometry determines how the whole mechanism aligns.
The cabochon and crown assembly sit in an exposed position and should be checked for damage. Dial printing, the secret signature, hands and crystal also deserve careful comparison with known examples. Because straps fit into a distinctive case structure, correct dimensions and a secure installation are more important than the name stamped on a replacement strap.
Movement service remains relevant even with quartz: battery history, corrosion risk and correct hand-setting should be established by a qualified watchmaker. Reference and serial markings should also be reconciled with the case, dial and paperwork rather than inferred from the appearance alone.
A collector’s conclusion
The strongest case for ref. 2405 is that it concentrates Cartier’s design intelligence without asking the movement to carry the story. It is recognisably a Tank, yet the vertical pivot gives it an identity no conventional rectangular watch can imitate. The mechanism invites handling, but the watch remains discreet on the wrist.
Collectors who demand a hand-wound calibre will still prefer ref. 2390. Buyers who value the Basculante as an object of industrial design may find the 2405 more coherent: slim, practical and faithful to the feature that matters. The buying decision should therefore turn on case integrity, exact-reference confirmation and the quality of the dial and fittings—not on an automatic assumption that quartz makes the watch less serious.
