Milifortic S133: The Alpinist Never Had a Stone Dial, So We Made One

Hi, this is Simon.

The Milifortic S133 is a limited-edition, Alpinist-style automatic watch with a stone dial. It comes in four stones: lapis lazuli, tiger's eye and malachite, which are natural, and turquoise, which is synthetic. We made 50 of each, 200 watches in total. Every piece is numbered on the caseback, and the edition will never be made again.

Over the years, the Alpinist has worn sunburst green, cream, black, a pressed rock texture and, this year, Edo purple. As far as we can find, it has never had actual stone under the crystal. That gap is where the S133 started.

The S133 at a Glance

What Is the Milifortic S133?

The S133, also listed as the S089 Gemstone Limited Edition, is our S089 with its standard dial replaced by a slice of stone. The S089 is our take on the Seiko Alpinist SPB121, and we recently expanded it with cream and desert red colorways. At the time of writing it holds a 4.97/5 rating from 30 customer reviews on our site, so we knew the platform could carry something special.

The S133 keeps the S089's Alpinist DNA: the 39.5 mm case, the cathedral hands and the inner rotating compass bezel. The main change is the dial, and it changes the whole watch.

It's also the first limited edition we've ever made.

Has Seiko Ever Made an Alpinist With a Stone Dial?

As far as we can find, Seiko has never released an Alpinist with a natural stone dial.

The line goes back to 1959, when the Laurel Alpinist became Seiko's first sports watch, built for mountain climbers. Today's Alpinist is best known for its green sunburst dial, alongside black, cream and blue versions. Seiko's limited editions have explored texture and color. The European-limited "Rock Face" (SPB355, 3,000 pieces) uses a pressed dial pattern modeled on a mountain rock face, and the 2026 145th-anniversary "Edo purple" Alpinist (7,000 pieces) brings a special purple dial.

The Rock Face is the closest Seiko has come: a stamped texture designed to look like rock. The S133 takes the literal route. Its dial is rock.

Why hasn't a major brand done it? Our guess is scale. When a limited edition means thousands of identical watches, natural stone is hard to justify. Every slice looks different, yields are low, and you can't color-match a stone the way you can a lacquer. At 50 pieces per stone, the math works differently.

The Design Idea: A Mountain Watch With a Piece of the Mountain

The original Alpinist was made for mountain climbers. So the question behind the S133 was simple: what if the dial were a piece of the mountain?

We picked four stones and named each after something you might see from a trail. Midnight is lapis lazuli, Golden Hour is tiger's eye, and Open Sky is turquoise. Deep Green is malachite, our nod to the green dial that made the Alpinist famous.

Three rules shaped everything else:

1. Keep the silhouette. Case, hands and compass bezel carry over from the S089, so the watch reads as an Alpinist from across the room.
2. Let the stone lead. To maximize the visual presence of the gemstone, we removed the cyclops lens, allowing you to fully appreciate the beauty and details of the stone.
3. Accept nature's variation. Pyrite clusters where it formed. Bands run where the stone grew them. We grade for quality, not uniformity.

Fittingly, the S133 ships on a leather strap, much like the 1959 original, which came on a leather cuff.

Meet the Four Stones

Lapis Lazuli — Midnight

Lapis lazuli is a rock rather than a single mineral. The blue comes from lazurite, the gold flecks from pyrite, and any white patches from calcite. For thousands of years its classic source has been the mountains of Afghanistan, which makes it a fitting stone for a mountaineering watch.

Our grading rule for lapis is short: deeper blue, less white, balanced gold. Following it is expensive. Where typical industry standards might get around 30 dials from a piece of rough, ours yields about 15. We explain the full grading process in Understanding Lapis Lazuli Dials.

It's the dressiest of the four and sits comfortably under a shirt cuff.

Tiger's Eye — Golden Hour

Tiger's eye is a quartz with a fibrous internal structure. When it's cut so those fibers run parallel to the dial's surface, it shows chatoyancy: a silky band of light that slides across the dial as you tilt your wrist. It's the only S133 that looks different every time you glance at it.

At around 7 on the Mohs scale, it's also the hardest of the four. Brown stone on a brown leather strap makes it the easiest to wear every day.

Malachite — Deep Green

Malachite is a copper mineral that grows in layers, which is where its bands come from. Depending on the slice, they can run as fine parallel lines or sweep in curves, and the green shifts from near-black to bright as light moves across them.

It's also the softest of the four, at 3.5–4 on the Mohs scale. That makes it the most demanding to slice thin and polish without chips or scratches.

If you know the Alpinist, you know green is its signature. Malachite is our stone answer to that green dial, and it passes for a dress watch until someone looks closely.

Turquoise — Open Sky

To be upfront: the S133's turquoise dial is made from synthetic turquoise, not natural stone. Natural turquoise is porous, and most of what's on the market has been resin-stabilized. We chose synthetic material because it offers better consistency, durability, and resistance to everyday wear, while preserving the beautiful turquoise color and texture we wanted to achieve. It still carries dark veining that webs differently across every dial.

This is the boldest S133 and the one that makes the most sense in summer. At $269, it's also the most affordable of the four.

See all four in motion:

How Is a Stone Dial Made?

A stone dial is a watch dial cut from a thin slice of stone rather than made from a finished metal disc. A standard dial starts as a brass blank that is stamped, finished and printed, and hundreds can come out identical. A stone dial starts as a rock, and no two end up the same.

Here's the route an S133 dial takes:

1. Grading the rough. Each stone is judged on its own terms. For lapis that means depth of blue and amount of white; for tiger's eye, the strength of the light band; for malachite, the contrast and continuity of the bands. 
2. Slicing. Blocks are cut into thin wafers with a diamond saw, to about 3 mm.
3. Backing and shaping. Many stone dials are bonded to a thin metal base plate for strength and to carry the dial feet. Each wafer is cut to size and drilled for the hands and the date window at 3 o'clock. Stone is brittle, so this is the stage where blanks are most likely to crack.
4. Grinding and polishing. Hardness across the four runs from about 3.5 (malachite) to 7 (tiger's eye), so each stone needs its own approach.
5. Inspection. Every dial is checked individually. For lapis, our standard keeps roughly half of what typical grading would accept.
6. Markers and printing. The hour markers are applied metal indices—stamped, polished and rhodium-plated, then pinned through the lapis dial—while the compass scale, minute track and texts are flat pad-printed.
7. Casing and numbering. Each finished watch gets its edition number, 01–50, engraved on the caseback.

Why Only 50 per Stone, and Why It Won't Come Back

The limit comes from the material itself. Strict grading, low yields and slow, costly production mean there simply aren't many dials good enough to use. We also wanted this level of dial work to belong to these 200 watches and nothing else.

A few rules keep the edition fair:

• Never remade. Once all 200 are sold, the S133 is closed for good: no restocks, no re-releases.
• Random numbering. Numbers are assigned at random rather than by order date, so buying first doesn't mean getting No. 01, and we can't take requests for specific numbers.
• One per stone per customer. You can own all four, but only one of each.
• Direct only. The S133 is sold only on miliforticwatch.com and our official AliExpress store, which share the same stock. It isn't available through dealers or other platforms.

Full Specifications

S133 vs. Seiko Prospex Alpinist SPB121

The S089 platform was designed around the SPB121, so that's the natural comparison.

Here's the honest read. If you need 200 m of water resistance and a 70-hour power reserve, the Seiko is the better tool. If you want an Alpinist-style watch with a dial no one else can have, for about a third of what Seiko charges for a current Alpinist, that's what the S133 is for.

Which S133 Should You Choose?

• Wear shirts or jackets most days? Lapis lazuli.
• Want one watch for everything? Tiger's eye.
• Love the classic green Alpinist? Malachite.
• Want color, especially in summer? Turquoise.

The limit is one per stone rather than one per customer, so you can own all four. And if you'd rather have the Alpinist look with a second time zone, our S103 GMT is built for exactly that.

Living With a Stone Dial

Your dial won't match the photos exactly. White specks, color banding and fine natural fissure lines are part of each stone's character, not defects. That's why we can't accept returns based on how the pattern looks. If your dial is clearly off-color for its stone, contact us within 7 days of delivery with clear photos and we'll review a return. A chipped or broken dial isn't a natural characteristic, so contact us about that too.

Is a stone dial fragile? It sits behind sapphire in a steel case, so everyday wear is fine. Natural stone is more sensitive to hard knocks than a metal dial, so avoid drops and impacts.

Water and care. The S133 is water resistant to 100 m. Keep perfume and cleaning chemicals away from it, and wipe it with a soft, dry cloth.

Warranty. Every S133 carries a 2-year warranty, with the same after-sales service whether you bought it on our website or from our AliExpress store.

Natural calcite, not a defect.

Where to Buy the S133

The S133 went on sale on September 21, 2026 (China time). Prices are $269 for turquoise, $279 for tiger's eye, and $289 for lapis lazuli or malachite.

Blog 15USD Exclusive Coupon：S133BLOG     

Shop the S133

FAQ

What is the Milifortic S133?

The S133 is Milifortic's first limited-edition watch: an Alpinist-style automatic with a stone dial, built on our S089. It comes in lapis lazuli, tiger's eye, malachite and turquoise, with 50 pieces of each.

Are the S133 dials real stone?

The lapis lazuli, tiger's eye and malachite dials are natural stone, cut and polished into dials without treatments that change their natural properties. The turquoise dial is made from synthetic turquoise.

Has Seiko ever made an Alpinist with a stone dial?

Not as far as we can find. Seiko's Alpinist has appeared with sunburst, colored and textured dials, including limited editions such as the Rock Face (3,000 pieces) and the 2026 Edo purple (7,000 pieces), but not with a natural stone dial.

How many S133 watches are made, and will they be restocked?

50 per stone, 200 in total. The S133 will never be restocked or re-released.

What movement does the S133 use?

The Sea-Gull ST2130 automatic, with date, hacking seconds and hand-winding. It beats at 28,800 vph and has about 40 hours of power reserve.

Are stone dials fragile?

Behind a sapphire crystal in a steel case, a stone dial handles normal daily wear. Natural stone is more sensitive to hard impacts than a metal dial, so avoid knocks and drops.

Can I choose my edition number?

No. Edition numbers 01–50 are engraved on the caseback and assigned at random, so ordering first does not mean receiving No. 01.

How much does the S133 cost?

$269 for turquoise, $279 for tiger's eye, and $289 for lapis lazuli or malachite.

A Note From Me

Most of what Milifortic makes is meant to be affordable and dependable, a watch you don't have to think twice about wearing. The S133 is the exception: a watch built around something we can't fully control.  If one of these 200 ends up on your wrist, I hope you find something new in the dial every time you look.

— Simon

About the author: Simon runs Milifortic, an independent watch brand making affordable everyday watches. About Milifortic

Seiko, Prospex and Alpinist are trademarks of their respective owner. Milifortic is an independent brand and is not affiliated with or endorsed by Seiko.