Seiko 5 Automatic SNKK31 SNKK31J1 SNKK31J Japan Made Men's Watch The Seiko 5 makes for a durable daily beater; a good, every day work watch saving your more fragile or expensive pieces from wearing out faster. It gives you back more than your money's worth and looks good enough for peppy dress-wear too! It’s meant to be worn 24/365 for decades together without babying it, as long as you don’t submerge it beyond its depth rating.