Seiko Cal. 5616 - 990

The Seiko 5616-990 represents an important milestone in Seiko's 1968 lineup. Powered by the 5616 caliber with 18j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-f2260a81067e]

Also known as: Golden Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1968

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