Seiko Cal. 3891 - 998

The 3891-998 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3891 caliber with 31j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-4d4903898fd2]

Also known as: Sumo, Flighty

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1975

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