Seiko Cal. 6657 - 158

This Spring Drive model from 1994 features a 43mm Titanium case. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-8293f8b5f6b9]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1994

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