Jaeger-LeCoultre Master Ultra Thin Q1212510 39 mm

The Master Ultra Thin Q1212510 reduces the collection to its essential hours, minutes and seconds in a 39 mm rose-gold case only 8.1 mm thick. Its beige dial and pin-buckle closure keep the presentation traditional, while the see-through caseback reveals that the slim profile is part of the mechanical proposition rather than a visual effect. The analogue display is deliberately spare, and 50 metres of water resistance suits the case.

Calibre 896 is an in-house automatic movement measuring 3.98 mm high. It contains 223 parts and 32 jewels, beats at 4 Hz and provides 43 hours of power reserve. Small seconds join the hours and minutes, while the movement's automatic winding supports the pared-back layout. The calibre carries a haute-horlogerie finish, and its construction is sized to preserve the reference's notably thin profile.