Seiko Cal. 6688 - 510

Released in 1971, the Cal. 6688 with design code 510 was part of Seiko's domestic market collection. With its 22mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-59fdf4ec4605]

Also known as: Helmet, Rally

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1971

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