| MODEL | Grand Chronographe Authentique |
| Limitation | 8 pieces |
| Ident No. | 102456 |
| MOVEMENT | |
| Calibre | MB M16.29 |
| Movement type | Manually wound monopusher chronograph |
| Chronograph | Monopusher chronograph mechanism with column wheel and horizontal coupling |
| Indications | Central hours and minutes, seconds at 9 o’clock |
| Displays (Chronograph) | Central seconds, 30-minute counter at 3 o’clock |
| Diameter | 38.40 mm |
| Height | 6.30 mm |
| Number of components | 252 components |
| Number of jewels | 22 jewels (hemispherical, cambered, olive-cut) |
| Power reserve | Approx. 55 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 | Screwed domed sapphire crystal case back, hinged cuvette with patented release mechanism |
| Crown | Integrated chronograph button with Montblanc emblem in mother-of-pearl |
| Dial | Solid 18 K gold dial with hand-crafted ruthenium guilloché decoration |
| Hands | 18K gold, chronograph hands in Pfinodal ® |
| Horns | With patented cuvette release mechanism |
| Diameter | 47mm |
| Height | 13.55 mm |
| Water resistant | 3 bar (30 m) |
| STRAP | |
| Material/Colour | Hand-stitched alligator-skin / Black |
| Clasp/Buckle | Pin buckle in 18K white gold |