Seiko 5 Sports Automatic Green Dial Men's Watch (SRPD63K1)

Why we picked it

• Green that still goes with a suit The dark green dial and matching bezel stand out more than black or blue, but stay muted enough for the office. It suits someone who wants one watch for work and weekends. Anyone who prefers a plain dress watch will find the dive style bezel too sporty.
• Mechanical, with no battery It winds itself as it is worn, can be wound by hand, and has a stop seconds hand for setting the time exactly. That appeals to someone curious about mechanical watches. Left off the wrist for a couple of days, it will need winding and resetting.
• Sized for a fuller wrist At 42.5 mm wide and 13.4 mm thick, it has real presence. That works on medium to larger wrists. For a slimmer wrist, check the size first.