Seiko Cal. 5641 - 661

The Seiko 5641-661 represents an important milestone in Seiko's 1965 lineup. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-406de1d67d36]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1965

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