Seiko Cal. 6640 - 178

The Seiko 6640-178 represents an important milestone in Seiko's 1986 lineup. With its 22mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-f808963ed6cd]

Also known as: Panda, World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1986

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