Calibre 460 (and similar 490 and 491) are manual winding movements from Jaeger-LeCoultre.

Designed for the iconic Reverso, the Calibre 460 family is a compact oval movement measuring 3.5 mm thick, 15.2 mm long, and 13 mm wide. It beats at 18,000 A/h and is hand-wound.

The three calibres are closely related

• Cal. 460 is the basic model
• Cal. 490 adds a special pallet cock and regulator
• Cal. 491 adds to cal. 490 a different lower cap jewel with end piece for the balance assortment as well as a different setting lever.

Apart from this, the three movements are mostly identical, with interchangeable parts.