With the TEFNUT Lady Butterfly, watch manufactory Moritz Grossmann presents a slice of great happiness in the smallest space. In accordance with the artistic design created by Harriet Oberlaender, a swarm of colourful butterflies has been painted on the mere 29 mm mother of pearl dial by hand in the form of a miniature painting.
For the artist, the butterfly is a playful symbol of lightness and the preciousness of each moment.

The new model was presented on 5 April 2019 to an exclusive audience in the Moritz Grossmann manufactory in Glashütte. In addition to the TEFNUT Lady Butterfly, selected works by the artist Harriet Oberlaender was also on display as part of a exhibition of paintings.

Born in Zwickau, artist Harriet Oberlaender has lived and worked on the Cote d’Azur for more than 20 years and has inspired an international audience in numerous exhibitions in France and Germany. Her expressive, energetic works are characterised by a feeling of freedom, expanse and the search for true happiness. Her visual language leads straight to the heart. The butterfly – one of the key motifs in her works – is a symbol of the human soul that wants to unfold and fly.

The design of the TEFNUT Lady Butterfly was particularly close to the artist’s heart: ‘I’m really pleased that I’ve been able to realise the TEFNUT Lady Butterfly for Moritz Grossmann. I want every glance at the watch not only to reveal the time to the wearer, but also remind her of the happiness of a fleeting moment’.

The Calibre 102.1

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Manufactory calibre 102.1, manual winding, regulated in five positions

Special features

Shock-resistant balance with inertia and poising screws, impulse pin integrated in rim; flat balance spring; balance staff with integrated safety roller; index adjuster with Grossmann micrometer screw; plate movement with 3/5 plate, frame pillars and separately removable clutch winding mechanism; frame parts in untreated German silver; 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


Hour, minute

No. of parts



22, of which 3 in screwed gold chatons


Lever escapement


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/hour

Power reserve

48 hours when fully wound

Operating elements

Crown in 750/000 gold with jewel for winding the watch and setting the time

Case dimensions

Diameter: 36.0 mm, height: 8.6 mm

Movement dimensions

Diameter: 26.0 mm, height: 3.5 mm


Bezel set with 80 brilliant-cut diamonds, 0.73 ct, TW vvsi


Mother of pearl, hand-painted


Manually crafted from steel, annealed to a brown-violet hue

Crystal/display back

Sapphire crystal, antireflective coating on one side


Satin strap with prong buckle in 750/000 gold


TEFNUT Lady Butterfly

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