Essentials Collection SSB321 H No battery change required and

No battery change required and powered by light energy

Balance wheel frequency set at 28

With a date calendar

the longest of any Seiko mechanical watch

Radio Sync Solar Chronograph automatically receives radio signals to precisely adjust the time and calendar The chronograph measures up to 60 minutes in 1/5 second increments with a split time measurement function and a date calendar

Essentials Collection SSB321 H No battery change required andFrom the Mens Essential Collection. A perfect blend of precision and design, this rugged quartz chronograph is crafted of stainless steel, with secure screwdown caseback and blue ion finish tachymeter bezel. The blue patterned dial, with yellow accents, features three subdials, a date calendar, and LumiBrite hands. Chronograph timing provides measurement of up to 12 hours of elapsed time in 1 5 second increments. 10 bar, 100M Water Resistant