Up for sale is a very lightly used Seiko Great Blue Hole. The blue fume dial is stunning. Specifications: Caliber # 6R15 Blue Dial Curved sapphire crystal Anti-reflective coating on inner surface 200m water resistance suitable for air diving Magnetic resistance H51mm x W44mm x D13.1mm Price is $750 Shipping in US only Gallery: https://imgur.com/a/FN22P90 Time stamp: https://i.imgur.com/EBajznp.jpg Plenty of reviews on WUS