Seiko Cal. 6644 - 606

The Seiko 6644-606 represents an important milestone in Seiko's 1972 lineup. With its 21mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-17f3c1918490]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1972

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