Seiko Cal. 5210 - 631

The Seiko 5210-631 represents an important milestone in Seiko's 1998 lineup. Powered by the 5210 caliber with 18j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-1f1af13519d0]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1998

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