Seiko Cal. 5661 - 813

The Seiko 5661-813 represents an important milestone in Seiko's 1988 lineup. Powered by the 5661 caliber with 31j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-b8ed7a9afd23]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1988

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