Seiko Cal. 6616 - 637

The Seiko 6616-637 represents an important milestone in Seiko's 1990 lineup. Powered by the 6616 caliber with 29j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-bf2c0c6eb258]

Also known as: Tuna, Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

29j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1990

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