Seiko Cal. 5616 - 521

Released in 1988, the Cal. 5616 with design code 521 was part of Seiko's domestic market collection. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-ce971dd2dbbe]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1988

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