The moon phase disc is made of 18K yellow gold and is hand-engraved with stars and sky after being given a microbead blasted finish. The moon is also made of 18K yellow gold and carved out a= s a separate part by a skilled craftsman.

Stepped bezel, engraved logos and complex three-dimensional shapes - in hard-to-process stainless steel - are machined using the world's top ultra-high precision microfabrication machines, with an accuracy of several microns. The newly designed, rounded bezel is inspired by vintage complication watches from the 1930s to the 1960s.

All 11 Roman indexes are hand-carved by a skilled craftsman. Synthetic lacquer in cashew is poured in to create a three-dimensional finish.
The NAOYA HIDA & Co. TOKYO brand logo and bar index are engraved with an ultra-high precision microfabrication machine, with synthetic lacquer in cashew poured in.

We use SUS 904L stainless steel with high corrosion resistance. It is only used by an extremely limited number of brands due to the difficulty in processing it.

The 16mm-wide, vintage-style pin buckle is also machined from 904L stainless steel, using an ultra-high precision microfabrication machine, before being polished. The form of the pin is composed of rich curves. The leather strap is hand-sewn with an Alcantara surface, and a lining to minimise sweat permeation.