Seiko 5 Sports SRPD51 vs Citizen Tsuyosa Automatic

The Seiko SRPD51 is the tougher, more feature-loaded watch: 100 m water resistance, a rotating dive bezel, day and date, and LumiBrite lume. The Citizen Tsuyosa is the dressier, slimmer pick with sapphire crystal and a 40 mm case that wears easier under a cuff. Owners of both praise the automatic movements and solid bracelets; the Seiko's Hardlex scratches more readily than the Citizen's sapphire, while the Citizen's 50 m rating and lack of a bezel make it the less rugged of the two.

• Choose the Seiko SRPD51 if you want a rugged everyday dive-style watch for swimming, timing, and low-light legibility.
• Choose the Citizen Tsuyosa if you want a slimmer, dressier automatic with sapphire crystal that slips under a shirt cuff.