Studio Underd0g made a calendar that cares about the weekend

99/120 bezel clicks. A sourced first look.

Cloud10 04Series Calendar on tan leather
Image: Studio Underd0g

The weekend indicator is a ridiculous thing to get excited about, and I rather like it. Studio Underd0g has built the 04Series around knowing where Saturday and Sunday fall, with a pointer date and moonphase sharing the same small dial. There is quite a lot happening here, but the Cloud10's pale blue and little pink accents make it look surprisingly friendly. I'm giving the family 99 out of 120 bezel clicks.

Cloud10 joins Arabian Sky, Shepherd's Delight and 0vercast. Each comes in 37 and 38.5 mm, with the brand explicitly presenting the two sizes as choices within the same model. The diameters remain different; they share the stated movement, 44.5 mm lug-to-lug measurement and 13.5 mm overall thickness. I haven't tried either on.

A calendar with a slightly different priority

The colored windows around the date track are the detail I keep coming back to. Set their alignment at the beginning of the month and they show where the weekends land. That monthly adjustment matters: this isn't a perpetual calendar quietly sorting everything out for you. I like the joke considerably more when the explanation is that straightforward.

The retrograde date hand travels around its scale and returns to the start, leaving the moonphase below unobstructed. In the manufacturer's film, the overlapping surfaces and the raised crystal are much easier to understand than in a straight product shot. It looks like a little instrument someone decided to have fun with.

I'd choose Cloud10 first. Arabian Sky's warmer face is appealing too, especially against green leather. The red Shepherd's Delight is more conspicuous than I would usually want, while the dark 0vercast makes the small colored details stand out. Four colors are plenty for me to have a preference without needing eight separate reviews of the same idea.

Small across, fairly tall above the wrist

The Seagull ST-2115B is an automatic developed for this project, with a stated 42-hour reserve and 4 Hz frequency. Sapphire covers the front and back, and water resistance is 50 m. The brand gives 10.5 mm thickness without the crystals, but 13.5 mm is the useful overall number when imagining it under a sleeve. That is the proportion I'd most want to check in person.

Fratello reports a starting US price of $1,100 and a November 17 ordering start. Those are reported figures checked November 14, rather than a completed US checkout. The live maker page displayed £750 and registration language during this check. Shipping dates depend on the order volume, according to Studio Underd0g. I'd confirm the exact strap price and current order window before assuming a watch is ready to leave the workshop.

Video: Studio Underd0g; manufacturer film, not Watch Desk footage

Where it lands on my chart

Studio Underd0g 04Series Calendar highlighted at $1,100 and 99 out of 120 bezel clicks

Chart snapshot 2026-11-14 · 122 reviewed watches. Explore the current chart

Key specs

BrandStudio Underd0g
Model04Series Calendar
Reference04CLCH_37_M / 04CLCH_38.5_M / 04ASEM_37_M / 04ASEM_38.5_M / 04SDNA_37_M / 04SDNA_38.5_M / 04OVCA_37_M / 04OVCA_38.5_M
Price$1,100 (US, as of November 14, 2026)
AvailabilityResearched first look. Regional sale, stock, source and delivery qualifications are detailed below.
Case37 or 38.5 mm; 44.5 mm lug-to-lug; 13.5 mm thick including crystals
MovementSeagull ST-2115B automatic; 42 hours; 4 Hz
DisplayRetrograde date, monthly-adjusted weekend indication and moonphase
Water resistance50 m
VariantsCloud10, Arabian Sky, Shepherd’s Delight and 0vercast, each in two sizes
PriceReported starting US$1,100; checked November 14, 2026

Source-based first look; no hands-on testing of this exact release is claimed. Brand relationship is not established in the retained source record.

Sources

  1. Studio Underd0g — release source underd0g.com
  2. Source — www.fratellowatches.com fratellowatches.com
  3. Source — underd0g.com underd0g.com
  4. Source — underd0g.com underd0g.com
  5. Source — underd0g.com underd0g.com

Model and variants

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