Seiko Cal. 6689 - 738

This Spring Drive model from 1978 features a 41mm Stainless Steel case. It features a White dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-4d006d03576f]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

White

Jewels

34j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1978

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