The Grand Seiko SBGY007 Omiwatari: case, stainless steel, 38.5mm x 10.2mm; 30 meters water resistance. Movement, hand-wound Spring Drive
link caliber
link 9r31, rated to ±1 second per day maximum deviation in rate; power reserve 72 hours, running in 30 jewels. Available this July. Find out more at Grand-Seiko .Thanks to Mr. Jeff Lessard, who pointed out by email that the 9R31 was also used in a 22-piece limited edition
link for Japan, SBGY005.