SB10 CHEESE GRATER

It's a grate watch - A Serious Joke

A first interpretation

Everything you read below was originally published on April 1st, 2026, as an April Fool’s joke. The unexpected enthusiasm around this watch encouraged us to turn the idea into reality with a limited edition of 12 pieces.
Of course, it should not be used to grate anything. That said, the cabochon is indeed made from a real cheese grater.
Enjoy the page, and if you dare, enjoy wearing it.

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The SB10 marks a new step for Sartory-Billard. A jumping hour watch conceived around touch, where material is no longer just seen, but becomes a surface to explore. The deliberately minimal display frees a central space designed as a direct point of contact.

With the SB10 Cheese Grater, Sartory-Billard takes a deliberately straightforward approach to material, integrating a cabochon crafted from a cheese grater surface. Selected for the precision of its stamping and the regularity of its perforations, this surface retains the properties that define its original function, while offering a new interpretation, both functional and unexpected.

A functional cabochon

This piece was born from a simple, almost mundane observation of life in Swiss watchmaking workshops. At times, without leaving the bench, one might take a quick break with a piece of cheese and some bread nearby, instinctively shaving a few flakes without preparation or dedicated tools. In those moments, the gesture is immediate, natural, almost obvious, and it is precisely this spontaneity that the SB10 Cheese Grater seeks to capture.

An intuitive ergonomics

The cabochon therefore retains its primary function. It is not a decorative motif or a symbolic reference, but an active surface, one that enables a simple gesture capable of turning an ordinary moment into immediate satisfaction.

Whether preparing an impromptu snack, adding a few shavings to a dish on the spot, or responding to a sudden craving for grated Gruyère, the watch supports a real, unfiltered use, without staging.

No hands

The SB10 Cheese Grater features no hands.
Time is entirely displayed through two ultra-thin sapphire discs, approximately 0.2 mm thick, which seem to almost disappear into the light.

The hour disc jumps 30 degrees every 60 minutes, instantly revealing the next numeral. This mechanism creates a strong visual effect, almost cinematic: a precise instant, a transition, a beat, a pulse.

The minute disc moves continuously around the cabochon, creating a contrast between jumping time and flowing time.
Two rhythms coexist, one discreet and punctual, the other smooth and continuous. It is this duality that defines the SB10’s unique character.

Minutes in orbit

The minutes are displayed via a sapphire disc completing a full rotation every sixty minutes. Around the cabochon, a peripheral ring coated with Super-LumiNova BGW9 traces the passage of time.
A red marker crosses this luminous ring, indicating the minute with immediate clarity during the day.
But it is at night that the SB10 reveals another dimension. The ring glows with an intense turquoise light, forming a continuous halo around the cabochon. The light appears to float, suspended around the central material.

Time is no longer simply read, it becomes atmosphere: a slow, silent, almost hypnotic rotation, a luminous circle in motion, an almost celestial phenomenon on the wrist.

The mechanics

Beneath this refined architecture lies a coherent mechanical construction.

The SB10 is powered by the G100 automatic calibre from La Joux-Perret, paired with a patented jumping hour module ensuring a crisp and precise jump.

Both hour and minute discs are made of sapphire and housed within a 39.5 mm stainless steel case.

Every technical choice serves a single vision: clarity, coherence, and obviousness.

Technical Specifications

Name: SB10 CHEESE GRATER
Reference: SB101SCG
Case: Stainless steel, 39.5 mm, alternating polished and brushed surfaces
Thickness: 11.5 mm
Lug to lug: 44 mm
Cabochon: Cheese grater surface
Movement: Swiss-made La Joux-Perret automatic movement, 55-hour power reserve coupled with a patented jumping hour movement
Water Resistance: 80 Meters
Bracelet Options:
• Anthracite rubber strap
Each watch includes a complimentary “cheese-style” strap.

And because at this point we had to go all the way, each watch will also come with its own cheese grater.

Availability

Price :
3800€ excl VAT on bracelet rubber

Limited edition of 12 pieces.
Delivery: Summer 2026

Disclaimer

This watch was designed to be worn on the wrist.

It is not intended to be used as an actual cheese grater. Attempting to do so may result in injury, damage to the watch, and very complicated cleaning situations.

Please do not use it to grate cheese, vegetables, your fingers, or any other object, including (but not limited to) your partner’s handbag.

Any use outside of its intended purpose remains entirely your responsibility.
SB10 CHEESE GRATER

SB10 CHEESE GRATER

ANTHRACITE RUBBER STRAP
€3,800.00 EUR
€3,800.00 EUR
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SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
  • SB10 CHEESE GRATER
SB10 CHEESE GRATER

SB10 CHEESE GRATER
€3,800.00 EUR
€3,800.00 EUR

Shipping & taxes

European Union customers: VAT is included in the price at checkout. No additional charges upon delivery.

United States customers: prices are quoted DAP (Delivered At Place). The customer is responsible for any tariffs and import duties as determined by local authorities at the time of import.

Rest of the world customers: prices are quoted DAP (Delivered At Place). Any applicable VAT / GST and import duties will be collected by DHL or FedEx prior to delivery.

STRAPANTHRACITE RUBBER STRAP
Disclaimer
We know this is a bit serious, but we have to include it. Thanks for bearing with us.
Disclaimer and Conditions of Use
By purchasing this product, you acknowledge and agree to the following:
Nature of the Product
The SB10 Cheese Grater is a timepiece intended solely to be worn on the wrist. It incorporates a surface taken from a cheese grater but is not designed or intended for use as a tool or for any purpose other than timekeeping.
Use and Responsibility
The perforated metallic surface may present a risk of scratches or minor injury upon contact with skin, objects, or other individuals. You agree to use the product with appropriate care in all situations.
Improper Use and Care
Any use of the product to grate or interact with food, materials, or objects may result in damage, injury, or hygiene risks. The surface is not designed to be cleaned internally. Any contamination, residue, or damage resulting from such use is not covered by after-sales service or warranty.
Limitation of Liability
Sartory-Billard declines all responsibility for any damage, injury, loss, or service-related claims resulting from improper use or misuse of the product.
Acceptance of Terms
By proceeding with your purchase, you confirm that you have read, understood, and accepted these conditions.
Technical Specifications

Name: SB10 CHEESE GRATER
Reference: SB101SCG
Case: Stainless steel, 39.5 mm, alternating polished and brushed surfaces
Thickness: 11.5 mm
Lug to lug: 44 mm
Cabochon: Cheese grater surface
Movement: Swiss-made La Joux-Perret automatic movement, 55-hour power reserve coupled with a patented jumping hour movement
Water Resistance: 80 Meters
Bracelet Options:
• Anthracite rubber strap
Each watch includes a complimentary “cheese-style” strap.

And because at this point we had to go all the way, each watch will also come with its own cheese grater.