| MODEL | TimeWriter I: Metamorphosis |
| Limitation | 28 pieces |
| Ident No. | 106168 |
| MOVEMENT | |
| Calibre | MB M67.40 |
| Movement Type | Manually wound monopusher chronograph with mechanical transformation of function and design of the watch from simple time indication to chronograph |
| Chronograph | Monopusher chronograph mechanism with column wheel and horizontal coupling |
| Indications | Hours at 12 o’clock, retrograde minutes, central seconds, date indication at 6 o’clock |
| Displays (Chronograph) | Central seconds, 30-minute counter via rotating disc at 6 o’clock |
| Diameter | 38.40 mm |
| Height | 12.45 mm |
| Number of components | 744 components |
| Number of jewels | 86 jewels |
| Power reserve | Approx. 50 hrs |
| Balance | Screw balance, Ø 14.5 mm; 59 mg.cm2 |
| Frequency | 18,000 vibrations per hour (2.5 Hz) |
| Balance spring | With Phillips curve |
| Plate | Rhodium-plated German silver, circular-grained on both sides, hand-chamfered edges |
| Bridges | Rhodium-plated German silver, “Côtes de Genève”, recesses circular-grained on both sides, hand-chamfered edges |
| Going train | Wheels: gold-plated, circular-grained, chamfered, diamond hubs on both sides Pinions: polished faces and toothing, burnished pivots |
| CASE | |
| Material | 18K white gold |
| Bezel | – |
| Sapphire crystal | Cambered sapphire crystal |
| Case Back | sapphire crystal case back |
| Crown | With Montblanc emblem in mother-of-pearl |
| Dial | Consisting of various fixed and moving components in German silver and sapphire crystal. |
| Hands | Date hand in German silver, hour, minute and chronograph hands in steel |
| Horns | – |
| Diameter | 47 mm |
| Height | 15.80 mm |
| Water resistant | 3 bar (30 m) |
| STRAP | |
| Material/Colour | Hand-stitched alligator-skin / Black |
| Clasp/Buckle | Pin buckle in 18K white gold |