Seiko Cal. 6644 - 636

The Seiko 6644-636 represents an important milestone in Seiko's 1982 lineup. It features a Black dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-3f67d286ef9f]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1982

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