Seiko Cal. 6628 - 964

Released in 1965, the Cal. 6628 with design code 964 was part of Seiko's domestic market collection. With its 19mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-15ddcb4dfb28]

Also known as: Tuna, Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1965

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