Tremblage Tourbillon

Availability: See this timepiece at 430 Park Avenue, NYC

• Limited Edition: Eight timepieces
• Case: White Gold
• Size: 44.5 mm, height: 13.9 mm
• Movement: calibre 103.0, manual winding, regulated in five positions
• Function: Hours and minutes, subsidiary seconds with stop second, Grossmann manual winder with pusher
• Power Reserve: approximately 42 hours
• Dial: Multi-part in German silver, galvanised in ‘black-or’, tremblage inner dial, printed Arabic numerals
• Caseback: sapphire crystal
• Hands: Handcrafted, polished steel
• Strap/Bracelet: Hand-stitched alligator leather with solid butterfly clasp in 750/000 gold

With absolute devotion, attention is paid both to the watch’s inner workings and its features. The TOURBILLON Tremblage’s dial is one of its special features – a multi-part construction made of German silver in a symmetrical design. The inner part with tremblage revives a historical technique. It is engraved by hand using a variety of burins: the tools are moved across the metal in a trembling motion, which is also where the name comes from, with the French ‘tremblant’ meaning ‘to tremble’ in English.

Special features:

Flying three-minute tourbillon with screw-secured driving wheel and V-shaped balance bridge (protected as a registered design); central minute display, off-centre display for hours and seconds with stop-second function, bridging of the scale gap in the minute dial from 25–35 minutes via a hand extension with separate scale (patented); stop-second function on balance rim with intervention by a hair brush (patented); asymmetric-arm lever escapement with counterweight and lever banking pin;

Grossmann balance with a suspended balance spring and regulation via poising screws in the balance rim; newly developed jewel bearing for the barrel; brake ring on the second arbor made of very hard, oily lignum vitae; movement wheels made of ARCAP;

Grossmann manual winder with pusher to override hand setting and to start movement; modified Glashütte recoil click; pillar movement with plate and frame pillars made of untreated German silver; plate and tourbillon cock hand-engraved; broad horizontal Glashütte ribbing; 3-band snailing on the ratchet wheel; raised gold chatons with pan-head screws; white sapphires as jewels; separately removable yoke winding mechanism