Seiko Cal. 6657 - 326

The Seiko 6657-326 represents an important milestone in Seiko's 1980 lineup. Powered by the 6657 caliber with 19j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-6f8c7b4f6018]

Also known as: Tuna, Pogue

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1980

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