Seiko Cal. 6694 - 640

Released in 1990, the Cal. 6694 with design code 640 was part of Seiko's domestic market collection. With its 21mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-44ca09ec22a5]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1990

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