The POWER RESERVE remains true to the family’s neoclassic style. A display back reveals the spirited beauty of the movement. From the front, Arabic numerals, a crisp minute scale, and the case with its delicate bezel as well as the gracefully tapered lugs project refined elegance.

The sublime, manually crafted hands provide an accurate reading of the time from any angle. Additionally, a two-colour power-reserve indicator tells the owner when the time has come to rewind the movement. It showcases the modernity of this perfectly balanced model.


The novelties

The dial

The winding crown and the pusher

The hands

The saphhire-crystal

The butterfly clasp

The novelties

The lineage continues with the POWER RESERVE. The new facets of the calibre 100.2 movement follow the tradition of carefully premeditated progress. Inside the second generation, the newly developed Grossmann balance, the Grossmann winder with pusher, and the power-reserve indicator based on a planetary gearing system come together as an exclusive composition in haute horlogerie. Externally, the POWER RESERVE emphasises the technical perfection of this manually wound watch, and with the pusher below the winding crown for the new handsetting train. As a systematic refinement, the POWER RESERVE visually remains true to its watch family. The slender three-part case with the gracefully elegant bezel puts the focus on the suave face of the watch. The generously dimensioned sapphire-crystal display back, which has an antireflective coating on the inside, reveals the full beauty of the movement of the POWER RESERVE.

The dial

A crisply drawn peripheral scale and pragmatic Arabic numerals grace the solid-silver dial. The face of the new BENU line is enriched with a two-colour power-reserve display, a modern detail that harmoniously complements the time indications and the brand signature.

The winding crown and the pusher

Aestitic and functional: the circumferential groove makes it easy to pull the crown. The pusher for the new handsetting train is set directly below the winding crown.

The hands

The gleaming hands are crafted from stainless steel in a proprietary process. A white HyCeram filling is applied to the small hand openings; it is ground flush with the metal and polished to a high gloss.

The saphhire-crystal

A sapphire-crystal glass protects the dial. It has an antireflective coating on one side to prevent viewdisturbing reflections of incident light. The extra-thick slightly cambered glass has a precision-ground chamfer that refracts the geometry of the succinct minute scale.

The butterfly clasp

The optional available butterfly clasp affords extra protection and remains firmly locked until the lateral safety buttons are pressed. It features an engraved logo and assures a particularly snug fit on the wrist.

The calibre 100.2

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Tech Specs


Manufacture calibre 100.2, manually wound, adjusted in five positions

Special features

Grossmann balance; lateral pusher for disabling the handsetting mode and starting the movement; bar-shaped power-reserve indicator with two-coloured display segment driven by a planetary gearing system; space saving and modified Glashütte stopwork with backlash; adjustment with Grossmann micrometer screw on a cantilevered balance cock; Pillar movement with 2/3 plate and frame pillars in untreated German silver, 2/3 plate, balance cock and escape-wheel cock hand-engraved; broad horizontal Glashütte ribbing, 3-band snailing on the ratchet wheel, raised gold chatons with pan-head screws; separately removable clutch winder; stop seconds for handsetting


Hours and minutes, subsidiary seconds with stop seconds, Grossmann winder with pusher, power-reserve indicator

No. of parts


No. of jewels

26 jewels, 3 of which in screwed gold chatons


Lever escapement


Shock-absorbed Grossmann balance with 4 inertia and 2 poising screws, Nivarox 1 balance spring with No. 80 Breguet terminal curve, Gerstenberger geometry


Diameter 14.2 mm, frequency 18,000 semi-oscillations per hour

Power reserve

42 hours when fully wound

Operating elements

Crown in 750/000 gold/ stainless steel to wind the watch and set the time, pusher in 750/000 gold to start the movement

Case dimensions

Diameter: 41.0 mm, height: 11.65 mm

Movement dimensions

Diameter: 36.4 mm, height: 5.4 mm


Three-part, precious metal


Solid silver, with Arabic numerals


Hand-crafted, steel

Crystal / display back

Sapphire crystal, antireflection-coated on one side


Hand-stitched alligator with precious metal prong buckle

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