Seiko Prospex S23631 Tuna 1975 Professional Saturation Diver Fireman Domed sapphire crystal with anti-reflection

Domed sapphire crystal with anti-reflection coating on both sides

The HIDDEN COAST Theme Series is designed to go well with street fashions and other styles

its red digit-dot numerals can be read at a glance during the day and with the push of a button at night

Dial: Orange

Seiko Prospex S23631 Tuna 1975 Professional Saturation Diver Fireman Domed sapphire crystal with anti-reflection1975 Saturation Diver's Watch Reinterpretation. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with recreations and reinterpretations of landmark achievements. Honoring the first watch designed to withstand the