Seiko Cal. 6331 - 997

The Seiko 6331-997 represents an important milestone in Seiko's 1985 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-c6ffa6dde889]

Also known as: Sumo, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1985

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