The ASTRON SSH077J1 watch is infallible in any situation: light, extremely robust thanks to the use of highly scratch-resistant titanium and its lightness. Featuring Seiko's patented "Super clear" sapphire crystal, a perpetual calendar and a record autonomy of approximately 6 months, this watch is a true technological feat. On the design side, the slightly shimmering green of the dial and the green ceramic bezel recall the light of nebulae in astronomy.