Details
Blue, but without making noise. The NK0051-51M is the easiest colour option in Citizen's KEI collection: an intense, uniform blue dial, a steel case that doesn't demand attention and an automatic caliber visible through the transparent case back.
The round stainless steel case measures 38 mm in diameter and 10.9 mm in thickness, and the bracelet attaches between the lugs, without being integrated into the case. It is a restrained size that does not impose a style. The bracelet, also in steel, maintains the sober line, and the blue of the dial stands out under a sapphire crystal without becoming flashy.
The blue reads easily: the minute and seconds hands reach right to the track, and the hour hand stays close to the indices.
Through the transparent case back, the Citizen 8310 automatic caliber is visible; it is wound by wrist movement and also manually via the crown. It includes a hacking function, and when fully wound its power reserve is approximately 60 hours.
Automatic Caliber 8310 60-Hour Power Reserve Flat Sapphire Blue Dial