The ArtyA Purity Stairway To Heaven Wavy HMS Sapphire Iridescent watch from the independent Swiss brand ArtyA in Geneva has a complex name, but looks impressive on the wrist.
The full model name reflects many features combined in one item, characteristic of the brand's creative approach. In this article, we will take a detailed look at the construction, materials, mechanism, and unique design solutions that make this watch interesting for collectors and experts.

Concept and Features of the ArtyA Purity Collection
The Purity collection occupies an important place in ArtyA's lineup, although its exact concept raises questions. The manufacturer positions Purity as a series of watches with transparent cases and open mechanisms, yet not all models have transparent cases, and some other brand collections also use similar technical solutions.
The name Stairway To Heaven has no direct analogs in watchmaking but reflects the musical preferences of the brand's founder Yvan Arpa, who is inspired by rock music, particularly the legendary band Led Zeppelin.
The term Wavy indicates a wave-like case design with smooth curves, intended to resemble ocean waves - emphasizing a connection with nature and dynamics. HMS is an abbreviation denoting hours, minutes, and seconds, the type of time display in this model.

Special attention is given to the case material - sapphire glass with an iridescent coating obtained at the Swiss company Black Collar. This gives the case a unique shimmering effect, enhancing visual appeal and emphasizing the exclusivity of the piece.
Materials and Case Design
The Purity Wavy HMS case is made of sapphire glass with a diameter of 40 mm and has water resistance up to 30 meters. The transparent case allows you to observe the mechanism from unusual angles, which is one of the most impressive design solutions in modern watchmaking.
An important detail is the individual screws with unique heads securing the case. According to ArtyA, the movement is exclusively developed for this model and is named Manufacture Purity STH HMS.

The hand-wound movement has an architecture reminiscent of a sci-fi spaceship. It is equipped with two barrels, providing a power reserve of up to 72 hours at a frequency of 4 Hz, ensuring smooth hand movement.
The central hands display hours, minutes, and seconds, corresponding to the HMS designation.
Unique Dial Design Solutions
One of the distinguishing features of the model is the way the hour and minute markers are applied - they are laser-engraved on the underside of the sapphire glass above the dial. This technique gives the watch a more serious and technical appearance despite its artistic nature.

The ArtyA logo in the form of the letter “A” is placed on the bridges of the mechanism between the two barrels and is the only branding on the front side of the watch, apart from the laser engraving.
Versions and Price
The watch is available in two main versions: with a transparent sapphire case and with an iridescent Sapphire Iridescent coating. The model is also offered in a basic hand-wound version and with a tourbillon complication.
Tourbillon versions increase the cost by 80,000-100,000 Swiss francs, while transitioning from the standard case to the iridescent coating costs an additional approximately 5,000 francs.

Production is limited to 99 pieces, and the price for one model is 50,900 Swiss francs.
Conclusion
The ArtyA Purity Stairway To Heaven Wavy HMS Sapphire Iridescent watch represents a unique combination of innovative design, complex technology, and artistic approach. The transparent sapphire case with a rainbow effect and exclusive mechanism make this model attractive to collectors and connoisseurs of independent Swiss watchmaking art.
Key Advantages of the Model:
- Transparent sapphire glass case with iridescent coating
- Unique wavy case design inspired by ocean waves
- Exclusive hand-wound movement with a 72-hour power reserve
- Laser engraving of hour markers on the inner side of the glass
- Limited release - only 99 pieces
These features make the ArtyA Purity Stairway To Heaven Wavy HMS Sapphire Iridescent a vivid example of modern watchmaking art with deep technical and aesthetic elaboration.