Seiko Cal. 6691 - 655

The Seiko 6691-655 represents an important milestone in Seiko's 1979 lineup. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-879292cfc348]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1979

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