Seiko Cal. 6690 - 178

Released in 1977, the Cal. 6690 with design code 178 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-ff8703060fbe]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1977

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