The transparent dial is one of the watch’s defining elements. In true Kunihiko Morinaga fashion, it has a photochromic treatment, which means that it changes colour according to the available light. The designer explains, “The intent was to add colour and take it away. I tried to capture the ethereal nature of time in the design by integrating a photochromic lens that changes colour based on ultraviolet light.”
When it is exposed to sunlight, the True Square’s dial darkens. But as the sun goes down – as it invariably does – the dial shade evolves into grey and finally becomes transparent, revealing the Rado calibre R734 at the heart of the watch.
The DiaStar Original 60-Year Anniversary Edition has been created in collaboration with the Swiss designer Alfredo Häberli.
Framed by a radial-brushed Ceramos™ coiffe with polished angles and detailing set over a matching, monochrome stainless steel case, the watch also features a sapphire crystal with hexagonal facets to mark six decades since the original watch. The case and dial are made in a monochromatic colour scheme, whereas the hands and hour markers are coloured with a touch of Super-LumiNova®.