Seiko Cal. 5616 - 633

The Seiko 5616-633 represents an important milestone in Seiko's 1979 lineup. Powered by the 5616 caliber with 31j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-518970c46af5]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

31j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1979

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