Seiko Cal. 6398 - 657

The Seiko 6398-657 represents an important milestone in Seiko's 1985 lineup. Powered by the 6398 caliber with 27j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-b8556c1f7843]

Also known as: Crown, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1985

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