Seiko Cal. 5631 - 869

This Spring Drive model from 1994 features a 40mm PVD Black case. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-f32e050da4af]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1994

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