Moritz Grossmann just put a linear power reserve display on the Benu for the first time, and it changes how the whole dial reads. The new Benu Power Reserve launched on September 30, 2026 in brushed steel or black DLC steel, priced at €40,800 before tax, limited to 18 pieces per reference.
AI disclosure: the photography in this post was generated from real reference images of the Benu Power Reserve to illustrate the watch's design and specs. It is not a photograph of a physical piece sold by 5D Watches.
TL;DR
- New caliber: in-house, hand-wound caliber 100.2, 227 parts, 26 jewels, 3 screwed gold chatons
- 42-hour power reserve shown on a linear trapezoid indicator, not a sub-dial
- Case: 41mm x 11.65mm, brushed steel or black DLC steel, sapphire front and back
- Price: €40,800 before tax, 18 pieces per reference
- Dial: anthracite sector dial, applied Arabic numerals, recessed small seconds at 6
What Grossmann Changed on the Benu
The Benu line has carried a small seconds sub-dial since it launched. The Power Reserve variant swaps that layout for an elongated trapezoid window running from roughly 9 to 11 o'clock, showing dark grey and white bars that shorten as the mainspring unwinds.
Why a Linear Display Instead of a Hand
Most power reserve indicators use a hand sweeping across a printed arc. Grossmann built a shuttered bar display instead, closer in spirit to the striped indicators on some German pocket watches. It is harder to engineer than a hand-and-arc setup because the bars have to stay perfectly aligned to the barrel's remaining torque, but it reads faster at a glance, no interpretation of a hand's angle required.
The trapezoid power reserve window, where most of the design work on this reference actually happened.
A Crown That Resets Itself
The Benu's signature complication carries over: pull the crown out and the hands reset to 12, release it and they jump back to the correct running position automatically. A small pusher at 4 o'clock restarts the movement after the reset, a detail few brands bother engineering since it adds real parts count for a function most owners use rarely.
The pull-out resetting crown and the small restart pusher at 4 o'clock.
Case and Dial Specs
| Spec | Detail |
|---|---|
| Case diameter | 41mm |
| Case height | 11.65mm |
| Case material | Brushed steel or black DLC steel |
| Crystal | Anti-reflective sapphire, front and back |
| Dial | Anthracite sector dial, snailed chapter ring |
| Water resistance | Not rated for diving, standard dress-watch resistance |
| Strap | Black kudu leather, steel prong buckle |
The Caliber 100.2 Movement
Hand-Finished, Not Just Hand-Wound
The caliber 100.2 is built and finished in-house at Grossmann's Glashütte workshop. It runs at 18,000vph (2.5Hz), a slower beat than most modern movements, which is a deliberate choice tied to the brand's revival of 19th-century Saxon watchmaking techniques rather than a cost-cutting one.
The in-house caliber 100.2, visible through the sapphire caseback, with its screwed gold chatons.
What's Inside
- 227 components
- 26 jewels
- 3 screwed gold chatons, a hand-set detail that holds the jewel bearings and is largely decorative on a modern movement, but it is a genuine Glashütte tradition Grossmann revived when the brand relaunched in 2008
- 42-hour power reserve, modest next to brands chasing 70-plus-hour marks, but typical for a small-independent hand-wound caliber at this price
A linear power reserve window sounds like a gimmick until the mainspring actually runs down and you realize a hand-and-arc display is genuinely harder to read at a glance.
Price and Where It Sits
At €40,800 before tax, the Benu Power Reserve sits above Grossmann's simpler time-only Benu references and below the brand's tourbillon and chronograph work. It also sits meaningfully below Glashütte neighbors like A. Lange & Söhne for a comparable level of in-house hand finishing, which is the honest reason collectors who know German watchmaking keep an eye on this brand instead of dismissing it as a lesser alternative.
Eighteen pieces per case finish is a real limit, not a marketing number. Expect these to move through Grossmann's small retailer network quickly once they land, and expect the pre-owned market to take a while to build any real depth on this specific reference.
At 41mm x 11.65mm, the Benu Power Reserve wears as a proper dress watch, not an oversized statement piece.
How Moritz Grossmann Fits Among German Independents
Grossmann is still a small name next to Lange or Glashütte Original, but it has built a consistent identity around visible, old-world hand-finishing techniques: hand-engraved balance cocks, the screwed gold chatons, and a house style that favors clean, legible dials over complication-for-complication's-sake. The Benu Power Reserve is a good example of that philosophy: it adds a genuinely useful function rather than a flashy one, and it shows the work rather than hiding it behind a simple hand.
FAQ
How much does the Moritz Grossmann Benu Power Reserve cost?
It is priced at €40,800 before tax, available in brushed steel or black DLC steel, each limited to 18 pieces.
What movement powers the Benu Power Reserve?
The in-house, hand-wound caliber 100.2, with 227 parts, 26 jewels, and a 42-hour power reserve shown on a linear trapezoid display.
How is this different from the standard Benu?
The standard Benu uses a small seconds sub-dial. The Power Reserve variant replaces part of that layout with a linear bar indicator showing how much mainspring reserve is left.
Is Moritz Grossmann a well-known brand?
It is a small, independent Glashütte manufacturer revived in 2008, respected among serious collectors for in-house hand-finishing but far less visible than A. Lange & Söhne or Glashütte Original.
How many pieces were made?
18 pieces per case finish, so 36 total across the brushed steel and black DLC steel versions.
Related Reading
- H. Moser & Cie: The Rebel Independent That Made Minimalism a Statement
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- F.P. Journe: The Connoisseur's Independent, and Why Collectors Keep Chasing It
- Ferdinand Berthoud Chronomètre FB 3SPC.4-1: 72-Hour Reserve in Black Ceramic