Seiko Cal. 3891 - 997

Released in 1987, the Cal. 3891 with design code 997 was part of Seiko's domestic market collection. With its 18mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-3ec0fe9f3df8]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1987

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