Zenmaster Automatic Watch
Zenmaster Automatic Watch
The Watch As Unique As Your Fingerprint
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Zenmaster was designed in-house by pOrtahl®, inspired by the tranquility of Japanese zen gardens.
- Each piece features a one-of-a-kind algorithmically created zen dial pattern that has never been created before, never again
- Zenmaster slides through any shirt sleeve thanks to its extremely slim, non-clunky profile of just 10.2 mm and 40.5 mm case size
- Stay protected against scratches thanks to our scratch-resistant IPH-coating, which is 7.5x harder than regular steel
- Appreciate a sense of quiet luxury through the use of different finishing techniques, from sandblasting, to brushing, to polishing on the details
- Switch styles in seconds while maintaining an integrated look thanks to a concealed bracelet connection
316L Surgical-grade Stainless Steel
316L Surgical-grade Stainless Steel
Weighty in the hand, yet effortless on the wrist thanks to surgical-grade solid stainless steel
AR-Coated Sapphire Glass
AR-Coated Sapphire Glass
Pristine clarity from every angle, thanks to our anti-reflective coated sapphire glass
10 ATM Water Resistant (100m / 330ft)
10 ATM Water Resistant (100m / 330ft)
Get your watch wet without worries with 10ATM water resistance (up 100 meters static pressure)
MIYOTA Cal. 9015 Movement
MIYOTA Cal. 9015 Movement
Outstanding timekeeping with our Japanese-made MIYOTA 9015 automatic movement. Enjoy a relaxed Sunday off thanks to a 42-hour power reserve.
Easy self-sizing, tools included
Easy self-sizing, tools included
Adjust the bracelet to the perfect fit yourself, straight after unboxing with included resizing tools. Half links are included for that snug fit!
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- All Shipments Insured
- 2-Year Warranty
Introducing Zenmaster
Zenmaster by pOrtahl® is 'The Watch as Unique as your Fingerprint'. It was designed in the spirit of quiet luxury, while still being suited for everyday wear.
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One of One Dial
Every Zenmaster is unique, no two are the same.
Using an 18th-century concept called 'Truchet-tiling', our algorithm creates a unique Japanese zen garden–inspired dial pattern for every watch.
That means your dial pattern is as uniquely yours as your own fingerprint.
The Math Behind The Dial
Sébastien Truchet was an 18th-century mathematician and the inventor of 'Truchet-tiling'.
He introduced the idea of connecting tiles with patterns into a grid, which could then be rotated individually to create entirely new designs of the same pattern.
Our algorithm uses his geometric concept to create the unique zen patterns found on Zenmaster dials.
Did you know Sébastien Truchet was also a watchmaker?
The Watch As Unique As Your Fingerprint
Materials & Coating
The case and bezel are made of surgical grade solid stainless steel, enhanced with a scratch resistant coating that gives Zenmaster sweat resistance, smudge resistance and increased hardness of 7.5x compared to regular steel.
Case
Our Zenmaster has an incredibly slim case height of only 10.2 mm—including crystal, no cheating— allowing it to slide effortlessly through any shirt sleeve.
At the heart of the case design are the lugs, which gracefully embrace the sides of the case.
The lugs are inspired by Yin and Yang, with one lug bending upward and the other down to symbolize balance and harmony.
Finishing Techniques
We combined three different finishes on Zenmaster.
Sandblasting gave it that cold matte silver coat, brushing added the linear grain on the sides, and precision polishing made the details stand out, to give Zenmaster this innate sense of quiet luxury
Movement
Never miss a beat thanks to a tried-and-true Japanese MIYOTA Cal. 9015, part of MIYOTA’s premium line, with 15+ years of track record.
The Cal. 9015 is equipped with Parashock, 24 jewels, 28,800 bph (8 bps) and a generous 42-hour power reserve, allowing you to take the watch off on the weekend for a quiet "Zen Day".
Bezel & Chapter ring
We incorporated a fluted bezel that follows the shape of the indices, in a sandblasted matte silver finish that adds character to the watch face.
Inside of the case on the chapter ring, you'll find our Japanese lotus petal shaped markers on the 3, 6, 9 and 12 positions.
Hands
The dauphine-style watch hands come in a rose gold IP-finish that adds warmth and sophistication to the dial.
The seconds hand features pOrtahl’s signature ring-shaped counterweight and features a matte silver tip.
Crystals
The Zenmaster is equipped with AR-coated sapphire crystal on both the front and the open caseback, chosen for its best-in-class clarity and durability.
Sapphire glass ranks just below diamond on the Mohs hardness scale and offers exceptional scratch resistance.
Easy Sizing
Each changeable link is secured with screw pins, a feature requested by our Facebook community of over 3,000 members.
Screw pins allow for easy sizing of the bracelet with the included tools. We're also throwing in 2 half links, for a perfect fit on every wrist.
Switch styles in seconds
Customize your Zenmaster look with a curated selection of premium FKM rubber straps in a variety of colors.
FKM rubber is highly resistant to wear and tear and it's often used in the aerospace and automotive industries.
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Ice Gray - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price -
Deepsea Blue - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price -
Polar White - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price -
Poolside Blue - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price -
Grizzly Brown - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price -
Moroccan Sand - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price -
Pitch Black - Premium FKM Rubber Strap (for Zenmaster)
Regular price $49.00Regular price
Specifications
Material Surgical-grade 316L Stainless Steel
Coating A-Grade IPH Coating (1,500)
Crystal Sapphire Crystal + AR coatings
Water resistance 10 ATM (100 m / 330 ft)
Movement Japanese Made MIYOTA 9015
Shock system Parashock
Power Reserve 42 hours
Vibrations per Hour 28,800 BPH
Jewels 24
Accuracy -10/+30 s / day
Bracelet size 22m mm tapered to 20 mm
Weight Case: 70g / Bracelet: 103 g
Frequently Asked Questions
How long does shipping usually take?
Shipping time depends on where you live. Below are the estimated shipping times per region.
North America: ~1 to 3 business days
Europe: ~1 to 3 business days
Asia: ~2 to 3 business days
Australia: ~14 business days
Rest of the world: ~14 business days
All shipments are shipped with insurance using the most trusted international shipping companies.
Do you ship to my country?
We currently ship to North America, The European Union, United Kingdom, Switzerland, Southeast Asia, Australia, New Zealand, Brazil and Mexico. Is your country not in the list? Chat with us if you'd like to request to add your country to the list.
How long does pOrtahl offer warranty?
Your watch purchases are protected against factory defects for the duration of two years under our international warranty.
What is the meaning of your brand name, pOrtahl®?
Whenever we want to know what time it is, the reason is usually stress inducing. We have to be somewhere and we want to be on time. This can make us feel anxious.
We imagine a world where people feel different when they check the time on our watches. We want our watches to allow you to escape your busy life through the dial for just an instant, every time you look at a pOrtahl watch.
The watchface is the fictional portal we escape through and our brand name was derived from the idea of that portal (pOrtahl®).
It's written with a-h-l so that everyone in the world pronounces it as we do in Dutch: 'por-taal'.
Why is this watch called 'Zenmaster'?
This watch is called Zenmaster because it teaches you that checking the time can be a moment of calm, not stress. It serves as a daily reminder to pause, breathe, and reflect.
Zenmaster is inspired by Japanese Zen gardens. Zen gardens are spaces designed for stillness, reflection, and balance.
The pattern on the dial represents the raked lines inside a zen garden and are uniquely generated by a mathematical algorithm so that no two watch dials are ever the same.
What makes Zenmaster 'The Watch As Unique As Your Fingerprint'?
This watch is called Zenmaster because it teaches you that checking the time can be a moment of calm, not stress. It serves as a daily reminder to pause, breathe, and reflect.
Zenmaster is inspired by Japanese Zen gardens. Zen gardens are spaces designed for stillness, reflection, and balance.
The pattern on the dial represents the raked lines inside a zen garden and are uniquely generated by a mathematical algorithm so that no two watch dials are ever the same.
What the experts had to say about Zenmaster
Customers wearing their one of one Zenmasters
Your photo featured here? Send us a photo of your Zenmaster at hello@portahl.com.
