Seiko Cal. 5631 - 869

The Seiko 5631-869 represents an important milestone in Seiko's 1968 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-f0a7817305d9]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1968

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