Seiko Cal. 6198 - 631

The Seiko 6198-631 represents an important milestone in Seiko's 1976 lineup. Powered by the 6198 caliber with 21j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-2f2da7550daa]

Also known as: Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1976

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