Seiko Cal. 5663 - 623

Released in 1978, the Cal. 5663 with design code 623 was part of Seiko's domestic market collection. With its 22mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-704c7af7eefc]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1978

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