Seiko Cal. 6656 - 691

The Seiko 6656-691 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-710de198192e]

Also known as: Samurai, Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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