Grøne Oldenzaal is still a young name, but it carries a very familiar Dutch signature.
The latest model from Tim and Bart Grönefeld’s more accessible watch venture is the Horologium, a compact hand-wound dress watch with a 39mm steel case, a small-seconds display and two sharply different personalities.
It’s an interesting move because the watch leans into the brothers’ established design language while bringing the price into a very different part of the market.
At a glance
- Grøne Oldenzaal has introduced the Horologium, a hand-wound 39mm steel dress watch in two limited-edition variants.
- The watch uses a La Joux-Perret movement derived from the G100 architecture, with small seconds and around 60 hours of power reserve.
- Each version is limited to 188 pieces, priced at €2,390 excluding VAT, with orders opening on 13 August 2026.
A familiar Dutch silhouette in a leaner package
The Horologium sits close to Grøne Oldenzaal’s Manueel One in spirit, but the proportions and details have been tuned toward a cleaner dress-watch feel.
The stainless steel case measures 39mm across and 10mm thick, with a polished concave bezel, satin-brushed flanks, downward-curving stepped lugs and a conical crown.
Those details give the watch much of its character, especially if you’ve followed the broader Grönefeld design language over the past decade.
The family resemblance to the Grönefeld 1941 Principia is hard to miss, particularly in the case form, hands, markers and general dial architecture.
Here, though, the proposition is quite different, with Grøne Oldenzaal positioning the Horologium as a more approachable expression of that aesthetic rather than a high-end independent piece.
Sapphire crystals are fitted front and back, both using orange gaskets that add a small but unmistakably Dutch flash of colour.
Water resistance is rated to 50 metres, which is sensible for a modern dress watch that isn’t trying to pretend it’s a sports watch.
Quirky and Classic take two very different routes
The Horologium arrives in two variants called Quirky and Classic, and the names are unusually literal.
Quirky uses a vivid Dutch orange centre dial with baby blue accents, paired with a baby blue leather strap and orange stitching.
It’s the bolder of the two by a wide margin, with a colour pairing that gives the otherwise elegant case a much more playful edge.
Classic is the quieter option, using a subtly sunray-brushed salmon centre dial with salmon-toned minute track details and silver-toned accents.
It comes on a dark brown leather strap with contrasting stitching, which puts the watch closer to traditional dress-watch territory.
Both versions use heat-blued hands and diamond-cut, high-polished applied markers, keeping the dial language crisp rather than decorative for its own sake.
The central seconds of the Manueel One has been replaced by a small-seconds display on the Horologium.
That sub-dial is set on a raised diamond-cut plateau with polished, circular-brushed and sandblasted finishes, a detail that links the watch to the visual vocabulary introduced on the Moment Meter Chronograph.
A hand-wound La Joux-Perret movement
Inside the Horologium is a hand-wound movement built on La Joux-Perret’s G100 architecture.
The G100 is more often encountered as an automatic platform, so its appearance here as a manually wound calibre suits the slimmer, more traditional character of the watch.
It runs at 28,800 vibrations per hour and offers approximately 60 hours of power reserve.
The movement is visible through the sapphire caseback and is finished with Côtes de Genève, polished anglage and heat-blued screws.
The Classic version keeps the caseback free of printed text, while the Quirky edition carries the Dutch inscription “Zoals het klokje thuis tikt, tikt het nergens.”
The phrase loosely translates to “there’s no place like home,” a fitting touch for a watch built around local identity without leaning too heavily on nostalgia.
Details & Specifications
| Brand | Grøne Oldenzaal |
|---|---|
| Model | Horologium |
| Case size | 39mm diameter, 10mm thickness |
| Case material | Stainless steel |
| Crystal | Sapphire front and back with orange gaskets |
| Water resistance | 50 metres |
| Dial variants | Quirky with Dutch orange centre and baby blue accents; Classic with sunray-brushed salmon centre and silver-toned accents |
| Hands and markers | Heat-blued hands and diamond-cut high-polished applied indices |
| Movement | Hand-wound La Joux-Perret movement derived from the G100 architecture |
| Jewels | 29 |
| Frequency | 28,800 vibrations per hour |
| Power reserve | Approximately 60 hours |
| Functions | Hours, minutes and small seconds |
| Strap | Leather strap with contrasting stitching; light blue for Quirky, dark brown for Classic |
| Buckle | Steel pin buckle |
| Limited edition | 188 pieces per variant |
| Order date | 13 August 2026 at 3 PM Amsterdam CET |
| Deliveries | Expected from mid-September 2026 |
| Price | €2,390 excluding VAT |
Limited numbers and a sharper entry point
Each Horologium variant will be made in 188 pieces, giving the model enough scarcity to interest collectors without moving it into unobtainable territory from the start.
Orders are scheduled to open on 13 August 2026 at 3 PM Amsterdam CET through the brand’s website, with deliveries expected from mid-September.
At €2,390 excluding VAT, the Horologium is aimed at enthusiasts who admire the Grönefeld style but want something simpler, manually wound and more financially grounded.
Its appeal lies in that balance, offering the recognisable hand of Dutch independent watchmaking in a watch that’s compact, wearable and refreshingly direct.
