Seiko Cal. 5656 - 397

The 5656-397 is a sought-after Automatic piece from Seiko's golden era. It features a Silver dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-7a9f3bd94eb0]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1977

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