Seiko Cal. 6657 - 257

This Automatic model from 1978 features a 34mm Two-Tone case. Powered by the 6657 caliber with 23j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-2209c96850bb]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

23j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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