Seiko Cal. 6618 - 646

Released in 1977, the Cal. 6618 with design code 646 was part of Seiko's domestic market collection. With its 19mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-7c7a4ce4ea57]

Also known as: UFO, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1977

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