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About the Jaeger-LeCoultre 657

It oscillates at 32,768 Hz with 4 jewels, and its two-hand display suits a rectangular dial without a seconds hand ticking across it. It is the movement of the Reverso One and of the Grande Reverso Lady Ultra Thin quartz models, which put the swivelling case on the wrist without winding or a rotor.

In the library it powers 31 Reverso references, with case widths from 16.3 mm to 24.4 mm, in steel and pink gold, many with diamonds.

The 846/1 is the hand-wound movement of the same ladies' models, and the 822 the hand-wound caliber of the men's Reverso.