Seiko Cal. 6663 - 840

The Seiko 6663-840 represents an important milestone in Seiko's 1975 lineup. With its 21mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-55361d1e9f15]

Also known as: Bellmatic, Arnie

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1975

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