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The year 2026 marks a historic milestone for the Moritz Grossmann manufactory in Glashütte, as it celebrates the 200th birthday of its visionary founder and namesake, born on March 27, 1826. A genius watchmaker, scientist, author, and initiator of the German Watchmaking School, Grossmann profoundly shaped the craft of horology and the fate of his hometown. Rather than merely imitating historical concepts, the modern manufactory honors his legacy by blending his cutting-edge philosophy with modern engineering. This dedication to technological perfection and exceptional aesthetics cements its place among the world's elite elite watchmakers.
To commemorate this bicentennial occasion, the brand has unveiled its third anniversary special edition: the TEFNUT Silver-Plated by Friction. Debuting on April 29, 2026, this launch presents an exclusive premiere for collectors—the very first time that the sleek TEFNUT model is made available in a stunning 750/000 yellow gold case, alongside a 750/000 white gold version. Both variations pay homage to their heritage by incorporating an "1826" engraving on the balance cock and showcasing a vintage 1875 "M. GROSSMANN" logo on the dial.
At the heart of the timepiece lies the ultra-flat manufactory calibre 102.1, a hand-wound movement measuring just 4 mm in height and 26 mm in diameter. This compact footprint enables the watch to retain its remarkably elegant, low-profile silhouette. The calibre embodies classic Grossmann pillar movement architecture with a 3/5 plate, incorporating his signature raised gold chatons, an optimized mainspring barrel with bilateral jewel bearings, and a stepped balance cock with a micrometer screw. Each component is meticulously hand-finished to ensure absolute technical and visual distinctiveness.
The defining aesthetic feature of this model is its striking dial, which boasts a rare "silver-plated by friction" finish. Executed entirely by hand in the brand's ateliers, a master artisan brushes a specialized paste of silver powder, salt, cream of tartar, and water onto the brass surface to create a velvety, fine-grained texture that beautifully diffuses light. To provide a contemporary contrast, the numerals, minute scale, and historic logo are rendered in a vibrant green hue. Hovering above are extraordinarily fine, hand-crafted lance-shaped hands, polished in gold for the yellow gold model and annealed to a brown-violet tone for the white gold edition. Each variation is strictly limited to just 12 pieces worldwide.

| Calibre | Manufactory calibre 102.1, manual winding, regulated in five positions |
|---|---|
| No. of Parts | 188 parts |
| Jewels | 22 jewels, 3 of which are in screwed gold chatons |
| Escapement | Lever escapement |
| Oscillator / Balance | Shock-resistant Grossmann balance with 4 inertia screws and 2 poising screws; Nivarox 1 balance spring; Diameter: 10.0 mm; Frequency: 21,600 semi-oscillations per hour |
| Power Reserve | 48 hours when fully wound |
| Functions | Hours and minutes |
| Operating Elements | Crown in 750/000 gold for winding the watch and setting the time |
| Movement Dimensions | Diameter: 26.0 mm; Height: 3.5 mm |
| Special Features | Shock-resistant balance with inertia and poising screws, impulse pin integrated in rim; flat balance spring; balance staff with integrated safety roller; adjustment with Grossmann micrometer screw; plate movement with 3/5 plate, frame pillars and separately removable clutch winding mechanism; raised gold chatons with pan-head screws; remodified Glashütte stopwork with backlash; mainspring barrel with bilateral jewel bearings for optimised power management in the low-torque range; ARCAP train wheels; proprietary escapement with 18-tooth escape wheel; special "1826" engraving on balance cock. |
| Case Material | Three-part, 750/000 yellow gold or 750/000 white gold |
|---|---|
| Case Dimensions | Diameter: 39.0 mm; Height: 8.5 mm |
| Dial | Brass, engraved, details set in green, and entirely hand silver-plated by friction |
| Hands | Manually crafted; polished gold (for Yellow Gold model) or steel annealed to a brown-violet hue (for White Gold model) |
| Crystal & Caseback | Sapphire crystal with anti-reflective coating on one side; transparent sapphire caseback |
| Strap | Hand-stitched alligator leather strap with prong buckle in 750/000 gold |
|---|---|
| Limited Edition | Strictly limited to 12 pieces worldwide per model (Released on April 29, 2026) |