Kazumura
Leadwood & Leadwood
- Delivery: 3 - 7 workdays
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Free delivery with tracking number
Our UK customers enjoy free 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 UK customers
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Free returns
Our customers from the UK benefit from free return shipping via a prepaid return label. For detailed information please look here.
The Kazumura Cave in Hawaii is considered to be the longest and deepest lava tube in the world. It originated 300 to 500 years ago when lava flowed into the Kilauea Iki crater.
As the outer layer of lava cooled and formed a membrane, lava continued to flow beneath it, eroding the ground and boring out deep tunnels beneath the surface.
Our Leadwood Kazumura model is meant to remind you of nature’s unstoppable power!
- Case: 40mm diameter, made of leadwood and stainless steel in silver
- Dial: leadwood with a fine grain
- Movement: Quartz movement by Citizen
- Band: adjustable length, made of leadwood and stainless steel in silver
- Luminescent hands (easily tell the time, even in the dark)
PACKAGE CONTENTS
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. :)
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.
Core Features

Metal-Core Technology
Our Metal-Core technology has been especially developed in order to make our watch constructions with natural materials even more durable. With timepieces that have this special type of construction, the clockwork is encased in an airtight metal jacket that guarantees a waterproofness of up to 5ATM.
We thereby unify the best of two worlds: natural diversity of materials & the longevity of our designs.

Natural Look and Feel
Thanks to our special constructions made from natural materials, your Holzkern model means you’re wearing a genuine piece of nature.
Enjoy the distinctive optic and feeling of wood, stone and other natural materials, and be inspired by their wearing comfort!

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 colours. This is our secret ingredient that guarantees your unique piece nature has a long and exciting life!
Hello Nature-Lover!
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