Seiko Cal. 6663 - 387

The Seiko 6663-387 represents an important milestone in Seiko's 1978 lineup. Powered by the 6663 caliber with 24j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-64e52fa962d7]

Also known as: Samurai, Bullhead

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1978

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