Seiko Cal. 6691 - 300

The Seiko 6691-300 represents an important milestone in Seiko's 1975 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-0560dcaba0fd]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1975

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