Seiko Cal. 6631 - 361

The Seiko 6631-361 represents an important milestone in Seiko's 1988 lineup. It features a White dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-cca249132fd1]

Also known as: Helmet, Flighty

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1988

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