Seiko introduced the new LX line of Prospex watches in Baselworld 2019 with the usual three categories of Land, Sea and Air. The new line features several watches in each, and all equipped with their legendary Spring Drive movements. The SNR031J1 is one of the Black Edition watches inspired by the Sea.
The case is a rather large 44.8mm diameter, but despite the dimensions, it sits comfortably on the wrist, as well as the case shape faceted along many angles to accentuate the zaratsu polished surfaces.
The case is depth tested and rated to 300m and according to Seiko is suitable for saturation diving.
The case is treated with a black super-hard coating and the flat surfaces are Zaratsu polished. This sea version is offered with a silicone strap, along with a clear dial layout with large, luminous hands, and huge hour markers. Legibility is excellent both in the dark and in light. Also standard is the uni-directional bezel, easy to operate.
The 5R Spring Drive caliber offers one-second a day precision alongside high levels of shock and temperature resistance. With these attributes, 5R is a good choice for sporting and adventure. It has been worn successfully both in space, when it travelled to the International Space Station and was worn on a space walk and at the top of the world, when Yuichiro Miura wore a Spring Drive watch on his third successful ascent of Mount Everest.