The Swatch MoonSwatch Mission to Earthphase – Moonshine Gold “Cold Moon” (Ref. SO33W701L) is a quartz chronograph from 2025, born from the collaboration between Swatch and Omega and developed around a particularly elaborate interpretation of the lunar theme. Within the MoonSwatch family, it occupies a more collectible and experimental position than versions that simply reinterpret colors and planetary references.
Its identity revolves around the simultaneous presence of the Moon Phase and Earth Phase displays, integrated into a predominantly white dial and complemented by details in Omega Moonshine Gold. The result is a watch designed primarily for those looking for a recognizable MoonSwatch, connected to the imagery of space while also offering complications that are unusual for this price range.
Design
The Cold Moon takes the visual language of the MoonSwatch and develops it into an almost entirely white configuration. The case, dial, and strap create a monochromatic foundation against which the dark indications, astronomical elements, and especially the golden accents associated with Omega Moonshine Gold stand out.
The aesthetic connection to the Speedmaster remains evident in the shape of the case, the tachymeter bezel, the chronograph pushers, and the overall organization of the dial. In this version, however, the instrumental character of the chronograph takes a secondary role compared with the representation of the Earth and the Moon.
The dial is arranged asymmetrically yet remains visually balanced. The Earth Phase shows the Earth as seen from the lunar perspective, while the moon phase indication uses two representations of the Full Moon coated in Omega Moonshine Gold. It is precisely the contrast between the dominant white, the blue of the Earth, and the golden surfaces that gives depth to a composition that, at first glance, might appear almost monochromatic.
Hands and indications retain the collection’s characteristic layout, while the tachymeter scale on the bezel creates a more pronounced graphic frame around the dial. The white strap continues the case’s color palette without any obvious visual interruption and helps make the watch immediately recognizable even from a distance.
Case & Construction
The case is made from white Bioceramic, Swatch’s proprietary material, which is also used for the crown and pushers. The construction retains the curved lugs, crown guards, and pusher arrangement that characterize the MoonSwatch family, but naturally replaces the weight and sense of solidity of a traditional metal case with a much lighter structure.
The dimensions are 42 mm in diameter, 13.75 mm thick, and 47.30 mm from lug to lug. The lug width is approximately 20 mm. These proportions provide a substantial visual presence without making the watch feel particularly massive, largely thanks to the low weight of the Bioceramic construction.
Above the dial is a domed crystal made from bio-sourced material, also recognizable by the small “S” etched in its center. It is therefore not sapphire: the choice is consistent with the MoonSwatch’s construction, but it also means lower scratch resistance than that offered by a sapphire crystal.
The stated water resistance is 30 meters, equivalent to 3 ATM. The construction is therefore intended primarily for everyday use and is not designed for demanding water-based activities.
Movement
Inside the Cold Moon is the Modified ETA G10.212 AB ND, a modified Swiss quartz movement designed to manage the distinctive functional architecture of this MoonSwatch.
This is an important detail because the movement is responsible not only for displaying the time and operating the chronograph function, but also for coordinating the representations of the lunar and terrestrial phases, which constitute the watch’s true technical distinguishing feature.
Power is supplied by a battery with an estimated life of approximately 38 months. From the wearer’s perspective, the main advantage is therefore the ability to manage a relatively complex configuration without the winding and adjustment requirements typically associated with a mechanical astronomical complication.
Rather than the refinement traditionally associated with a haute horlogerie caliber, what matters here is integration: the movement allows Swatch to combine chronograph, Moon Phase, and Earth Phase functions in an accessible product designed for everyday use.
Functions & Complications
The watch displays hours, minutes, and seconds and features a chronograph function with chronograph seconds. The tachymeter scale on the bezel completes the layout derived from the sporting chronograph.
The most interesting complication, however, is the relationship between the Moon Phase and Earth Phase. The lunar indicator follows a cycle of approximately 29.5 days and incorporates two full moons coated in Omega Moonshine Gold. It is therefore not merely a decorative element: the representation changes as the lunar cycle progresses.
The Earth Phase uses the same period of approximately 29.5 days, but operates according to a reverse cycle. The concept reproduces what an observer would see when looking at the Earth from the Moon: when we observe a Full Moon from Earth, the Earth would appear in the opposite phase when viewed from the lunar surface, and vice versa.
The combination of the two indications therefore makes it possible to visualize two perspectives of the same astronomical relationship simultaneously. More than the chronograph itself, it is this function that distinguishes the Cold Moon from more conventional MoonSwatch models.
Performance
On the wrist, the first thing you notice is the contrast between the dimensions of the case and the low weight of the construction in Bioceramic. The 42 mm diameter ensures a noticeable presence, while the 13.75 mm thickness gives the chronograph a fairly pronounced profile. However, the 47.30 mm lug-to-lug distance keeps the case relatively compact on the wrist, preventing its proportions from appearing excessively elongated.
The approximately 20 mm lug width keeps the strap well proportioned to the case and contributes to the overall balance. Despite its dimensions, the lightness of Bioceramic makes the watch feel less substantial than its appearance might suggest: it is primarily the white dial and astronomical indications that determine its wrist presence. The thickness, together with the domed crystal, remains noticeable under a close-fitting cuff, a characteristic consistent with the casual and collectible nature of the model.
The white rubber strap with VELCRO closure and Bioceramic loop prioritizes lightness and immediate adjustability. The system makes it easy to adapt the fit quickly, although it deliberately provides a more informal wearing experience than a metal bracelet or a traditional strap with a buckle.
Legibility of the time remains good, but the dial requires greater attention when the eye moves toward the astronomical indications. Earth Phase, Moon Phase, and registers share a relatively compact space: this is the price to pay for a composition that prioritizes character and visual intrigue over the purity of a purely instrumental chronograph.
Technical Data
Brand: Swatch Watches / Omega Watches – (Collaboration);
Model: Swatch MoonSwatch Mission to Earthphase – Moonshine Gold “Cold Moon” (Ref. SO33W701L);
Year: 2025;
Case Material: White Bioceramic (Case, Crown and Pushers);
Case Diameter: 42 mm;
Case Thickness: 13.75 mm;
Lug Width: ~20 mm;
Lug-to-Lug: 47.30 mm;
Crystal: Domed Bio-Sourced Material Crystal with Etched “S” in the Center;
Water Resistance: 30 m / 100 ft (3 ATM);
Battery Life: ~38 months;
Movement: Quartz Watches, Modified ETA G10.212 AB ND (Swiss Movement);
Functions: Hours, Minutes, Seconds, Chronograph Seconds;
Complications: Moon Phase Display (29.5-Day Cycle with Two Full Moons Coated in OMEGA Moonshine Gold), Earth Phase Display (29.5-Day Reverse Cycle), Tachymeter Scale;
Bracelet / Strap: White Rubber Strap with VELCRO Closure and White Bioceramic Loop;
Type: Casual Watches, Chronograph Watches, Collectible Watches, Limited Edition Watches, Moon Phase Watches, Mythology & Cosmos Watches;
Sex: Unisex Watches;
Nationality: Swiss Watches.
Retail Price (Launch): €330 / $450.
The Swatch MoonSwatch Mission to Earthphase – Moonshine Gold “Cold Moon” is one of the most distinctive interpretations of the MoonSwatch concept because its identity is not based solely on a new color combination. The Earth Phase, the Moon Phase with Omega Moonshine Gold elements, and the Modified ETA G10.212 AB ND give it a more specific technical and graphic personality.
Among its strengths are the lightness of the construction, the immediacy of the quartz movement, and above all a pair of astronomical indications that are difficult to confuse with those of a traditional chronograph. Its launch price also placed it well below what is normally required for a Swiss watch capable of offering these types of displays simultaneously.
The compromises remain those associated with the MoonSwatch philosophy. The bio-sourced material crystal is more vulnerable to scratches than sapphire, the 30 meters of water resistance require some caution, and the lightweight construction does not provide the same sense of solidity as a steel chronograph. The VELCRO strap, although practical, also emphasizes the informal character of the watch.
The verdict therefore depends on what you are looking for. As an affordable alternative to a traditional chronograph, there are more robust and pragmatic options; as a collectible object connected to the MoonSwatch universe, however, the Cold Moon has much more distinctive characteristics. Earth Phase, Moon Phase, and Moonshine Gold are not simply graphic references, but the elements around which the watch’s entire identity is built.
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