Seiko Cal. 6663 - 376

The Seiko 6663-376 represents an important milestone in Seiko's 1987 lineup. Powered by the 6663 caliber with 19j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-163aacdb2d9a]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1987

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