Seiko Cal. 6691 - 990

The Seiko 6691-990 represents an important milestone in Seiko's 1990 lineup. Powered by the 6691 caliber with 32j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-b68228325ee8]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1990

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