A nice Casio watch which has a black strap. The watch runs on batteries, so it's easy to maintain.
Casio | G-shock Carbon Core Guard | Black Yellow Strap | EX- Watch
Amazon
Casio Mens Analogue-Digital Quartz Watch with Resin Strap GA-2000-1A9ER
WatchShop
Mens Casio 'G-Shock' Yellow and Black Plastic/Resin Quartz Chronograph Watch