Seiko Cal. 5644 - 778

The Seiko 5644-778 represents an important milestone in Seiko's 1979 lineup. It features a Navy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-2cdf91a837b2]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1979

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