Seiko Cal. 6644 - 742

The Seiko 6644-742 represents an important milestone in Seiko's 1988 lineup. It features a Green dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-46d761fc156a]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1988

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