Seiko Cal. 5661 - 347

The Seiko 5661-347 represents an important milestone in Seiko's 1974 lineup. The Fixed bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-9f814702ce40]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1974

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