Seiko Cal. 6398 - 643

The Seiko 6398-643 represents an important milestone in Seiko's 1977 lineup. Powered by the 6398 caliber with 24j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-71ea7b9be7f7]

Also known as: Shogun, Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1977

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