Solid State Watch

Solid State Watch



Free shipping for orders above 100 USD.

We customize and ship all orders from our NYC studio. Customized and regular orders usually ship within 1 business day.

Detailed shipping + return policy.

Movement: Casio F-91W
Strap: Nick Mankey Designs Hook Strap
Resin: Formlabs Clear V4, Art Resin 2 Part Resin


This is an experimental art project. Each piece is handmade in-house. We make a batch every week, and they take a few days to finish. Expect your order to ship within 1-2 weeks from when it was placed.

If you order a SSW, you assume responsibility for inputting your desired UTC time and wrist size.

Please make sure you read this whole page before placing your order and are game for the hooha.

Solid State Watch is a Casio F-91W movement permanently cast into a transparent resin case. It's in there forever. No buttons, no functions, no light, fully waterproof and no changing that 10 year battery.

It just tells time.


This project begins as a celebration of the Casio F-91W wristwatch. Initially released and unchanged since 1989, this affordable, reliable and accurate timepiece is a beautiful feat of engineering. You seriously can't find another piece of technology that's so ubiquitous and does what it is supposed to for as long as it does without any intervention. It's amazing.


Individually cast into a transparent resin case, each Solid State Watch comes with its own unique imperfections.


Your desired time

When you place your order, input your desired time in UTC format. Once your watch is fabricated, the time cannot be adjusted. is a helpful site to figure out your time in UTC format.

No buttons

The electronics of the Solid State Watch are completely sealed, so you can't push any buttons to switch modes or adjust the time. Your watch ships set to whatever timezone you'd like. Eventually your watch will drift. Worst case scenario, it may drift up to ±1 second/day. But in practice, it will likely be far less than that. If you want to nerd out on its accuracy, check out this youtube video analyzing 100+ F-91Ws that have been running for 13 years.

No battery changes

The Casio F-91W is optimized to last on its 3V CR-2016 battery for 7 years assuming you use the light for 1 second and the 20 second alarm everyday. Since we won’t be using the alarm or light, it should last 10+ years.

No light

Yea, we'll miss that cutie LED. Since the buttons are sealed off, you won't be able to access the light. But really... you don't need it and let's save that battery power.

100% waterproof

Watches are usually rated for water pressure resistance because gaskets and other waterproofing mechanisms all eventually fail under pressure. Solid State Watch is completely solid and waterproof.

Fun bonus : The display of Solid State Watch is visible from all angles underwater. Most watches have air inside them which causes the watch crystal to act like a mirror underwater (unless your viewpoint is near perpendicular to the display).  Since there’s no air inside Solid State Watch you’ll be able to read the display from all angles underwater.

What's that orange dot?

Solid State Watch has a circular fluorescent orange dot placed over the date on the movement. The F-91W movement doesn’t account for leap years, so the date will be incorrect after a Leap Year. The fluorescent orange dot simultaneously masks and draws attention to this imperfection.

What about daylight saving time?

We’re hoping DST goes away soon. Until then, many countries still use it. Since you can’t adjust the time on a Solid State Watch, you can remember to adjust for DST in your head for part of the year or.... get 2 watches ;)

Making your Solid State Watch

We’re casting each and every Solid State Watches in our Brooklyn Studio. The process involves a series of steps, beginning with a 3D print of the main body printed on a Form 3 printer. Then we cast, heat, vacuum and UV cure a movement set to your timezone into the body. This casting process is done in multiple steps to achieve our desired finish. All of these steps are done by hand, and we embrace the slight imperfections of the process that make each watch unique.

Custom Hook Strap© Elastic Watch Band by Nick Mankey Designs

Solid State Watch ships with a Lunar Grey custom printed Hook Strap© Elastic Watch Band with brushed metal hardware, handmade in California by Nick Mankey Designs.

Known for their comfort, quality materials + hardware and ability to absorb strain on your watch’s spring bars, these bands come perfectly sized for your wrist (down to the 1/4”), and have the ability to micro-adjust to the perfect tightness. These are absolutely the most comfortable watch bands you'll ever experience.



  • Size : 32mm x 38.4mm x 10mm
  • Weight : 19g
  • Lug width : 18mm
  • Estimated battery life : 10+ years
  • Movement : Casio F-91W
  • Battery : 3V CR-2016



Customer Reviews
4.8 Based on 28 Reviews
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Zachary C.
United States

Five Star

My experience was 5-star and I think the key to your experience being 5-star as well is good expectations. If you are purchasing this watch, loving the fact that it is made "by hand" in a makers' shop in Brooklyn is key. My watch has tiny imperfections. I asked for the watch to be shipped without the band and this probably created a situation where QC on the lug holes didn't occur, as one was not bored deeply enough in the case. I have a micro-bit set and took care of this easily. I had a little resin residue around the case and tiny little imperfections in the resin. Mainly three bubbles that didn't come out during the vacuum process and I can see a few millimeters of finger print on the face of the digital screen. I LOVE THESE DETAILS. I don't really notice them unless I am super-carefully inspecting the piece - but when I do, it reminds me that people in a shop handled and created this work of art. Because of day-light-savings-time, I mis-ordered my watch by requesting the wrong time. I just emailed them and they took care of me before shipping the watch out. The watch is beautiful in concept and execution. Exactly what I wanted.

Jeff M.
United States United States

Love the product but wish they could add a few

Absolutely love the watch. It’s something I have to stop myself from wearing and wear some other watch I have. The one thing I wish they could do and I understand why they don’t is add a solar fuel cell. That would be so sick. And for that this is why I give it 4 stars instead of 5

United States United States


My only regret is not buying it sooner. With DST ending a few weeks ago, it's already an hour off, but I truly don't care. More than that I kinda love the time-glitch it causes in my head.

United States United States

Great fun watch!

I absolutely love this thing! It’s super fun and was everything I hoped for. Kinda my hipster go to! I was definitely surprised how quickly it became my everyday watch. It gets more wrist time than my JLC or explorer 2. Wonderful product!

Andrew B.
United States United States


Even better in person, Super lightweight and comfy.