Seiko Astron

The Seiko Astron, reference SSJ007J1, has a 39 mm titanium case. The case is 12.3 mm thick, with a lug-to-lug measurement of 46.1 mm and a water-resistance rating of 200 metres. Solar-powered calibre 3X22 contains 8 jewels and operates for approximately 6 months when fully charged. A sapphire crystal with a Super Clear coating covers the dial; the dial has a date display. A three-fold clasp with push-button release and fine adjustment fastens the watch. The hands and indices carry LumiBrite. Movement accuracy is plus or minus 15 seconds per month without signal reception at temperatures between 5 and 35 degrees Celsius. The bezel has a ceramic insert.