Based on the Horological Machine 2, MB&F presents Horological Machine No2-SV, featuring a room-with-a-view crystal-clear sapphire case with titanium back. With its transparent case, HM2-SV offers visual access to the hand-finished, 349-component engine powering the indications on its iconic twin dials.

The blue of the gasket is echoed in the hour disk and moon phase, and also the blued 22k gold Battle-axe automatic winding rotor is visible through the display back. To ensure maximum light and visibility through to the movement, the two dials (minutes/date) are also in sapphire; lightly brushed to provide full legibility of the polished silvered numbers while allowing maximum light through to the engine beneath. This engine, developed by award-winning watchmaker Jean-Marc Wiederrecht, features the world’s first mechanical movement offering: Instantaneous Jump Hour, Concentric Retrograde Minutes, Retrograde Date, Bi-Hemisphere Moon Phase and Automatic Winding. The watch will be limited to just 25 pieces worldwide. [via hodinkee]