Seiko Cal. 6657 - 260

This Spring Drive model from 1988 features a 43mm Two-Tone case. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-a7870a1980e3]

Also known as: Shogun, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1988

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