Casio AD-500 80's Yacht timer! Lovely condition considering it's age, currently on a NATO Strap, not really my choice but neither is the bi metal strap. I need to give it some
12 Best Affordable Sailing Watches (+4 for Superyachters) – Nomadic Sailing
Vintage Casio YACHT TIMER TRW-31/New Case | Bangkokjunkman.com
Big Yella - The Everyday Yachting Watch | WhichWatch.org