Amazon.co.jp: Casio GWN-1000NV-2AJF Gulfmaster Master in Navy Blue Wristwatch, Radio-Controlled Solar Compatible with 6 Stations Worldwide, Blue, Dial color - black, Wristwatch, radio wave solar, triple sensor, tide graph compatible with 6
Casio G-Shock Gulfmaster Analogue/Digital Mens Blue Watch GWN-1000-2A