Seiko Prospex Sea

The Seiko Prospex Sea, reference S23633J1, is a dive watch with a 47.7 mm steel case. A super hard coating covers the case, which measures 14.1 mm thick and 46.7 mm lug-to-lug. The quartz calibre 7C46 has approximately 60 months of battery life and precision of plus or minus 15 seconds per month. The sapphire crystal has an anti-reflective coating on its inner surface. The black dial shows central seconds, a date and the weekday. Hands and indices have LumiBrite. The watch is water resistant to 300 metres and has a folding clasp, with 22 mm lug spacing.