Seiko Cal. 6645 - 178

The Seiko 6645-178 represents an important milestone in Seiko's 1999 lineup. With its 18mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-4621989a878e]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1999

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