Zenmaster: 'A Watch As Unique As Your Fingerprint'
By combining an 18th century idea with a mathematical algorithm, we create a unqiue zen garden pattern for every Zenmaster watch.
Zenmaster by pOrtahl®
Introducing Zenmaster
Your new Zenmaster watch is one-of-a-kind. How? Using an 18th century concept called ‘Truchet Tiling’ combined with a mathematical algorithm we create a one of one Japanese zen garden inspired pattern for every Zenmaster watch.
That means your dial is as personal to you as your own fingerprint. No two watches are ever the same.
Truchet Tiles + Algorithm = Dial Pattern
By combining the concept of Truchet-tiles with a mathematical algorithm, we create a completely unique dial pattern for every Zenmaster watch.
Did you know Sébastien Truchet was also a watchmaker?
Sébastien Truchet
Mathematical Algorithm
Zen Garden Inspired Dial Pattern
Subtle nods to Japanese culture
- A one-of-one Japanese zen garden inspired dial pattern on every watch, created with a mathematical algorithm and etched into every dial with precision
- A tried-and-true Japanese MIYOTA 9015 Premium Automatic Movement, with 15+ years of proven track record
- Japanese lotus flower petal inspired indicators on the chapter ring
- Yin and Yang inspired lugs that hug the side of the case
- All serial numbers start with 108, a number of great significance in zen-buddhism, representing the 108 earthly temptations
Case & Bracelet
- 40.5 mm case size with an extremely slim non-clunky profile of 10.2 mm thick - and that's including crystal—no cheating
- Concealed bracelet connection that fits any straight-end 22 mm bracelet or strap
- Double quick release bracelet (316L SS) with butterfly clasp and screw pins for easy adjustment with the included tool
- 10 ATM (100 meters / ~330 ft) Water Resistant
Materials
- Made from 316L Surgical Grade Stainless Steel in a mix of sandblasted matte silver and polished silver finishes
- A-grade surface coating (IPH), increasing surface hardness of the Zenmaster by 7.5x to protect against scratches, blemishes, sweat, fingerprints and wear marks
- Sapphire glass on the front and exhibition caseback, treated with anti-reflective coating, for pristine clarity from every angle
- FKM cut-to-size Rubber strap available as add-ons in multiple colors for a completely new look
Easy Adjustment
Minimalistic Design
The pattern may seem outspoken, but it disappears and reappears depending on how the light catches it, maintaining the minimalistic look of the watch.
Founders Edition
Only during our crowdfunding campaign will you be able to purchase a Founders Edition Zenmaster, with the Founders inscription on the dial.
Easy Adjustment
Effortlessly undo the bracelet with the double quick release spring bar and easily adjust your bracelet to size, using the included screwdriver tools.
Zenmaster's Details
There is a lot to discover on the Zenmaster watch. From the lotus flower petal shaped indicators, to the yin and yang inspired lugs. These details are meant to help you tell a story.
Sign Up To Our Priority Access List
✅ Priority access to information
✅ Exclusive photos and videos of Zenmaster
✅ Everything you need to know about pOrtahl®, Zenmaster and how to back
Spec Sheet
Here is the full specifications sheet detailing Zenmaster's size, weight, materials, coatings and performance.
Trusted By Customers Worldwide
Two-Year International Warranty
Dutch Brand Founded in 2020
Proven Track Record, 563% Funded in 2022
Facebook Community of 3,000+ Members
What Customers Have To Say About Our Watches
Karel v.d. W.
It really is the watch I was missing! Functional, fashionable and a smooth delivery and shipping process. And very nice unboxing. The only time I had to adjust the machinery was due to the change to summertime :-)
Phil H.
Fantastic time piece. It is my daily watch. I wear to work as a service technician. Still getting alot of compliments. After a year on my wrist it looks the same as the day I first received it. Amazing!
Bram S.
Finally decided to purchase a Peacemaker and I have zero regrets. Been wearing it for a couple days now. The titanium feels really good and the quality of the watch is outstanding. Great watch.
The People Behind pOrtahl®
In 2020, we, Jordi van Staveren (left) and Alain van den Donk (right), founded pOrtahl® with a mission: to reimagine classic watchmaking for today’s world.
Frustrated by the endless copies of legendary designs flooding the market, we set out to create watches that honor classic watch design while speaking a bold, new, modern design language—and most importantly, without the sky-high price tag.
Join us on this adventure!
In 2022, we launched our first watch, Peacemaker, on Kickstarter & Indiegogo. With 222 backers and 563% funding, it proved our vision resonated.
In March 2025 we’re writing the next chapter of pOrtahl® with the Zenmaster—a watch inspired by Japanese zen gardens. Zen gardens (枯山水, karesansui) symbolize balance, simplicity, and peace—offering a moment of calm in the midst of chaos.
Frequently Asked Questions
Have a question about Zenmaster or our upcoming campaign? You can find answers to the most frequently asked questions here
Sign Up To Our Priority Access List
✅ Priority access to information
✅ Exclusive photos and videos of Zenmaster
✅ Everything you need to know about pOrtahl®, Zenmaster and how to back