Seiko Cal. 7121 - 663

The Seiko 7121-663 represents an important milestone in Seiko's 1978 lineup. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-5eaec973f84c]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1978

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