Seiko Cal. 5256 - 644

The Seiko 5256-644 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-2fea23dc937f]

Also known as: UFO, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1978

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