Seiko Cal. 5631 - 670

The Seiko 5631-670 represents an important milestone in Seiko's 1996 lineup. Powered by the 5631 caliber with 32j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-bbcf7b0e6f54]

Also known as: Golden Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1996

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