Seiko Cal. 5661 - 547

The Seiko 5661-547 represents an important milestone in Seiko's 1966 lineup. Powered by the 5661 caliber with 22j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-7e63783d4e50]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1966

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