GTR Original Casio G-Shock Watch (Collector Item) The fourth G-Shock collaboration with the Nissan GT-R went on sale in Japan on March 23 at shop.nissan.co.jp for 18,700 yen. The watch is a black DW-5600 with red accents including a red interior case and a dual-layer band with a red inner layer. The GT-R logo appears on the face, EL backlight, stainless steel case back, and packaging.