from 50.500 

You can configure your own watch. To do so, please select a variant of the watch, a strap colour and a clasp. Your selection will be marked by a red border.

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Grossmann‘s watchmakers fulfilled a long-standing wish when they created the innovative winding mechanism for the TEFNUT. The quest for a robust alternative to the conventional crown winder ended with an exceptionally original solution: The Grossmann strap winder makes it possible to wind the watch hands down, so to speak, with just a few turns of the strap attachment at 6 o‘clock.

To enable this remarkable feat, the calibre 102.2 was extensively reworked and the exterior form of the TEFNUT modified. A first glance is enough to see that the Grossmann strap winder has strikingly different strap attachment points and an unusual setting crown position. With its two distinctive versions — „Classic“, and „Fancy“ — in rose-gold or white-gold cases, the TEFNUT Twist stands out prominently in terms of both appearance and mechanical ingenuity.

 You can find more details about this product on our official Moritz Grossmann website.

Additional information


Rose gold Classic, White gold Classic, Rose gold Fancy, White gold Fancy


Manufacture calibre 102.2, manually wound, adjusted in five positions

No. of parts


No. of jewels

19, of which 3 in screwed gold chatons


Lever escapement


Nivarox 1 balance spring, Shock-resistant Grossmann balance with 4 inertia and 2 poising screws


Diameter: 10.0 mm, Frequency: 21,600 semi-oscillations per hour

Power reserve

48 hours when fully wound

Operating elements

crown at 4 o'clock to set the time, rotatable strap attachment for winding the watch


Hours and minutes, subsidiary seconds with stop seconds


750/000 gold, three part

Case Dimensions

Diameter: 36.0 mm, height: 9.64 mm

Movement dimensions

Diameter: 26.0 mm, height: 4.2 mm


argenté, faced with mother-of-pearl, set with brilliant-cut diamonds


steel, annealed to a brown-violett hue, Hand-crafted

Crystal / display back

Sapphire crystal, antireflective coating on one side

Special Features

adjustment with Grossmann micrometer screw on a cantilevered balance cock, raised gold chatons with pan-head screws, balance staff with an integrated space-saving single safety roller instead of the conventional double roller, frame parts in untreated German silver, handsetting via crown at 4 o‘clock, impulse pin attached to rim, mainspring with bridle, plate movement with 3/5 plate and frame pillars, rapid winding with rotatable strap attachment at 6 o‘clock, shock-resistant balance with inertia and poising screws, stop seconds at the safety roller when the crown is pulled, stopwork with sawtooth wheels, subsidiary seconds at 7 o‘clock, winding via bevel gear set and winding transmission with backstop ratchet


alligator leather, hand-stiched

Strap color

Black, Dark Brown, White


Pin buckle

Closer material

750/000 gold

Strap Length

XS (-1 cm), Normal, XL (+1 cm)