Nauru
Koa & Gray
- Delivery: 2 - 5 workdays
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Free express shipping worldwide
Our customers enjoy free express delivery without any import duties or taxes! Learn more>
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24 months warranty
If you find a defect in your model, please contact our customer support and we’ll find the best solution for you. Learn more>
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24-day refund policy
You are free to return your model within the 24-day period. We advise that you first contact our customer support before creating the return label. Learn more>
- No after-sale duties or taxes for US customers
Named after Nauru, a small island nation in Micronesia, this timepiece will win you over with its distinctively powerful look and the fact that it’s waterproof to 10ATM.
The special cactus-resin coating seals and protects the koa wood while showering, bathing and washing hands.
- Case: 45mm diameter, made from koa wood and stainless steel in gray
- Dial: Stainless steel in blue
- Movement: Quartz movement by Seiko
- Bracelet: Adjustable length, made from koa wood and stainless steel in gray (fits on every male wrist)
- Innovative Easy-Switch interchangeable bezel system
PACKAGE CONTENTS
How do I get my watch running?
In order to get your watch up and running, remove all protective foils first. With a Quartz movement, you can directly set the time by turning the crown, which is the small calibration wheel on the side of the case. As soon as you’ve set it to the correct time, push the crown gently against the case and your watch will begin operation.
If you have an automatic or solar watch, you’ll have to first wind it up or charge the battery.
How do I adjust my watch to the perfect size?
With so many different designs, there’s definitely the perfect model for every wrist size. Our watches with linked bracelets can be easily adjusted to any preferred length.
Additional bracelet links and the necessary tools are enclosed free of charge so that you can immediately adjust your model to your individual wrist size and wear it.
The leather watch straps and vegan alternative straps in our product range come in industry-standard sizes. For particularly short or long watch straps, you’re sure to find what you need at your trusted specialised watch or jewellery dealer.
What is delivered in the package contents?
Every single Holzkern product is delivered in a high-quality solid wooden box in which your piece of nature can be safely stored. The wooden box is lined with cork, which optimally protects your model during transport or storage.
The cork that comes with our watches and Bandlets is reversible and inscribed on both sides respectively with the sentence in German - “So einzigartig wie du”, as well as English - “As unique as you”.
For all models with linked bracelets, we additionally send the matching extension links including tools free of charge. In this way, you can individually adjust your personal piece of nature and immediately start wearing it. :)
Core Features
Hydro-Defense Technology
Our HydroDef technology takes the resilience of natural materials to the next level. By means of a special resin coating, exposed elements of natural materials are significantly better protected from weather conditions (especially water).
Hydro-Def makes your piece of nature a faithful companion for all-purpose wear!

koa wood
A piece of Hawaii for your wrist! Koa wood comes from the South Sea paradise and is one of the most popular woods in the world due to its unique grain. In its homeland, the wood is used to make surfboards and ukuleles, for example. The detailed surface texture, combined with golden to reddish brown colors makes every object made from koa wood a real eye-catcher. That's why you can find unique watches and jewelry made from this precious raw material - eye-catching accessories for a special look!
Easy-Switch Bezel
Making our watches even more unique? We make it possible with our Easy-Switch interchangeable bezel system. A specialized construction of the case and bezel allows the bezel to be removed, and replaced via a simple twist movement, with watches that have this function.
One watch - an endless amount of styles. Long live diversity!

316L Stainless Steel
To protect our wood and stone materials from breakage and external pressures, we combine them with 316L stainless steel, also known as "surgical steel". The composition of iron, chromium, nickel and molybdenum makes it particularly robust and corrosion resistant.
The shiny surface provides a flawless look and can be easily coated with other colors. This is our secret ingredient that guarantees your unique piece nature has a long and exciting life!
Hello Nature-Lover!
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