This is a Paul Hewitt watch which comes with a green strap. The watch runs on batteries, so it's easy to maintain.
From Amazon
Paul Hewitt - Watch - PH-SA-R-St-B-20S
ShopBetter24
Unisex Watch Paul Hewitt PH-SA-R-St-B-20S (Ø 39 mm)
Shopaide
Unisex Watch Paul Hewitt PH-SA-R-St-B-20S (Ø 39 mm)