Studio Underd0g 04SERIES Calendar Puts the Weekend on the Dial

Studio Underd0g has built its name on watches that treat colour and humour as serious design tools.

The new 04SERIES Calendar moves that idea into more complicated territory, introducing the British brand’s first automatic watch and its first calendar complication.

Its defining flourish is a weekend indicator, a small but clever reminder that not every calendar watch has to treat Monday as the centre of the universe.

At a glance

• Studio Underd0g has introduced the 04SERIES Calendar, its first automatic watch and first calendar complication.
• The watch combines a retrograde pointer date, moonphase display and manually adjusted peripheral weekend indicator.
• Pricing is listed at GBP 750, USD 1,100, EUR 800 or CHF 800, with availability from 17 November 2026.

A calendar watch with a weekend bias

The 04SERIES Calendar takes a familiar complication and gives it a very Studio Underd0g sense of priority.

Instead of building the dial around a conventional day-date layout, the watch uses a retrograde date, a moonphase display and a peripheral weekend tracker that highlights Saturdays and Sundays around the edge of the dial.

The weekend display works through chamfered, CNC-cut windows aligned with the dates of the month.

It isn’t an automatically programmed calendar, so the wearer quick-sets the indicator at the start of each month using the second crown position.

That manual approach keeps the idea simple, but it also gives the complication a certain charm.

This is a calendar watch for someone who appreciates mechanical information, but doesn’t mind being reminded that the best part of the week deserves its own indication.

Two case sizes and four dial moods

The stainless steel case is offered in 37mm and 38.5mm sizes, both in 316L stainless steel.

Its shape leans on traditional watchmaking cues, with a flat stepped bezel, polished bevels and slim lugs rather than an aggressively modern profile.

The construction includes a double-domed sapphire crystal, a screw-down display caseback and a signed crown.

Thickness is 10.5mm without the crystals and 13.5mm overall, while the lug-to-lug measurement is 44.5mm and water resistance is rated at 50 metres.

The dial range carries Studio Underd0g’s usual appetite for colour.

Cloud10 is a light silvery blue, Arabian Sky is gold, Shepherd’s Delight is red and 0vercast is a dark blue-grey.

The brand ties the palette to the view from its office window when thoughts start drifting toward the weekend, which feels entirely on message for a company that has always treated naming and colour as part of the product.

The dials use several layers and finishes, including a satin-polished treatment.

Leaf-shaped hands handle the hours and minutes, while an inner chapter ring replaces conventional hour numerals.

Retrograde date meets moonphase

The retrograde date is more than a decorative choice.

On a watch with a moonphase, a traditional sweeping date hand can interfere visually with the lunar display as it crosses the dial.

Here, the retrograde mechanism lets Studio Underd0g keep the date legible while avoiding that obstruction.

The date is adjusted through a concealed pusher at 2 o’clock, while the moonphase is corrected at 8 o’clock.

It gives the watch enough mechanical interaction to feel engaging without turning the dial into a technical diagram.

A Seagull-based automatic built for the 04SERIES

Inside is the Seagull ST-2115B for Studio Underd0g, an automatic movement developed over two years with the Chinese manufacturer.

Seagull also supplies the hand-wound chronograph calibre used in Studio Underd0g’s 01SERIES, so the partnership isn’t new territory for the brand.

For this project, more than 30 bespoke components were designed, developed, tooled and tested before being integrated into one of Seagull’s automatic base movements.

The calibre runs at 28,800 vibrations per hour, has hacking seconds and offers a 42-hour power reserve.

It’s visible through the sapphire caseback, while assembly, inspection and regulation are handled in Great Britain at Studio Underd0g’s D0ghouse workshop.

Details & Specifications

The 04SERIES Calendar fits neatly into Studio Underd0g’s broader appeal because it adds genuine complication without sanding away the brand’s personality.

It’s playful, but not throwaway, and the weekend indicator gives the watch a reason to exist beyond simply adding another moonphase to the market.