Seiko Cal. 5661 - 535

The Seiko 5661-535 represents an important milestone in Seiko's 1980 lineup. Powered by the 5661 caliber with 20j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-d7335ff8df7d]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1980

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