Seiko Prospex x Automatic ft. 1968 Heritage Modern Re-Interpretation aka Marinemaster GMT aka Night of Siam Thailand (Limited Edition of 500 Pieces) Men Diver Round 200m Water Resistant Watch SPB487J1 SPB487 SPB-487 SPB-487J1 Experience the allure of the Prospex SPB487 Thailand Exclusive Limited Edition 1968 Diver Heritage GMT, inspired by Siam sunsets. Its vibrant orange dial with luminous markers ensures visibility, while the black bezel and stainless steel bracelet add sophistication. This limited edition watch showcases the craftsmanship and cultural significance of Seiko, making it a valuable addition to any collection. Caliber Number / Movement 6R54 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 72 hours (+25 to -15 seconds per day) Crystal Sapphire crystal (anti-reflective coating) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel (super hard coating) case with stainless steel band (three-fold clasp with secure lock, push-button release with extender) Water Resistance 200m / 660ft diver Case Size Thickness: 12.9 mm Diameter: 42.0 mm Length: 48.6 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. 1968 Heritage Modern Re-Interpretation aka Marinemaster GMT aka Night of Siam Thailand (Limited Edition of 500 Pieces) Made in Japan LIMITED EDITION on the case back Serial number engraved on the case back Magnetic resistance (4,800 A/m) Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Date and 24-hour (GMT dual time) display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)