Inspired by the functionality of the 1960's Omega Chronostop, our modified ST19 Cal. AR-02 adds some sportiness to the conventional monopusher. At only 12.50mm thick, the Mesos sits comfortably on the wrist and is the thinnest column wheel monopusher available under USD $25,000. Scroll down to see the functionality and how this complication differs from a conventional monopusher.

The Mesos includes two calfskin leather bands paired with a finely polished signed buckle or a premium butterfly clasp chosen carefully to match the sporty undertones of the dial. The 39 mm 316L stainless steel case hugs the wrist for a snug fit, while the subtle vertically brushed dial and raised chapter ring shine from below the sapphire box crystal. The crown proudly displays the Canadian Rockies - a familiar sight to all Calgarians. The subtle color contrasts make the Mesos a sporty companion that's still classy enough to join you for a formal outing.

Not in the market for the monopusher but love the look? We have you covered! The Mesos is also available in a lower-cost, unmodified ST19 standard variant which we will regulate to the same rigorous standards as our modified movements.

All models are a limited edition of 75 units. We have spent a long time planning and developing this project, and we are excited to bring you a watch you can enjoy as much as we do. Claim yours today while quantities last!

Arcus Mesos · Monopusher · $599

Limited Edition - 75 units per color

CAL. AR-02 · 39mm · Blue

CAL. AR-02 · 39mm · Black

Arcus Mesos · Standard · $475

Limited Edition - 75 units per color

ST19 · 39mm · Blue

ST19 · 39mm · Black

What is a monopusher chronograph?

Most chronographs are operated with two pushers found on the side of the case at about 2 and 4 o'clock. The top button controls the start/stop functions of the chronograph and the bottom one resets the mechanism to zero. A conventional monopusher however, does the whole sequence with one single button : Start->Stop->Reset.

How is the Caliber AR-02 different from a conventional monopusher?

While seemingly very similar to the Cal. AR-01 found in the Arcus Tropos, the Cal. AR-02 adds a twist onto the original design. The first click of the pusher starts the chronograph, the second click stops it. Upon releasing the pusher after the second actuation, the chronograph resets. Since the button only has to be pressed twice to get through the whole sequence, this makes the Mesos very practical for lap timing. A very unique addition to any watch collection since no such mechanisms are available on the market today!

Why use the Seagull ST-19?

The most common question we get is why we put so much effort into modifying a Chinese built movement. There are actually three practical considerations behind our decision:

The first was to keep the sales price down. Had we used anything swiss made, that would've pushed costs well north of $1,000 USD. Hardly affordable...

The next was the size. A primary complaint about all entry level monopushers we saw was that a 14mm+ case thickness was too bulky. The ST-19 allowed us to create a nicely proportioned watch that's only 12.50mm thick!

Finally, it's a really good and robust movement! Good quality control will ensure delivery of a watch that will last for years to come. While there are several common issues with the chronograph mechanism, they are often very simple to rectify and are only the result of poor adjustment. To learn more, please see this article about the ST-19 that we've put together to explain how the movements fail, and why it happens, and what we do to prevent it.

To learn more about the quality control tests all our watches must pass before delivery, please see the Warranty page.

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