Seiko Cal. 6631 - 460

The Seiko 6631-460 represents an important milestone in Seiko's 1974 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-9be35f1093b6]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1974

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