Seiko Cal. 6644 - 847

The Seiko 6644-847 represents an important milestone in Seiko's 1990 lineup. It features a Green dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-cb17659c3f49]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1990

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