Seiko Cal. 5231 - 657

The 5231-657 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-0e8132299672]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1968

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